JAZZ FELL FROM nowhere, face-down onto the white sands of a sun-washed beach. She rolled to her side, squinting as she looked around; the beach sparkled like powdered diamonds. She closed her eyes, letting the bright sunlight sink into her silver sh.e.l.l. The tiny machines that coated her hummed with pleasure as they ate up the free energy. All around her, the air buzzed with nanites not guided by her genie. She exhaled a thin swarm of machines, commanding them to acts of piracy. Given time, she could manufacture more nanites; right now, here in Atlantis, it was simply more expedient to steal them. nowhere, face-down onto the white sands of a sun-washed beach. She rolled to her side, squinting as she looked around; the beach sparkled like powdered diamonds. She closed her eyes, letting the bright sunlight sink into her silver sh.e.l.l. The tiny machines that coated her hummed with pleasure as they ate up the free energy. All around her, the air buzzed with nanites not guided by her genie. She exhaled a thin swarm of machines, commanding them to acts of piracy. Given time, she could manufacture more nanites; right now, here in Atlantis, it was simply more expedient to steal them.

The ghost of Jandra's personality shouted somewhere in the back of her mind, but as the power levels of her genie increased, the faint remnant grew quieter. Jazz sat up, wincing from her wounds. The dragon had given her quite the workout. She ran her silvery fingers along the three-inch gash he'd torn in her belly, knitting the wound shut. She turned her attention to her shoulder. The heat of the sword had carbonized much of the tissue. It wasn't going to be as easy a fix. She set her nanites to work on it, then flowed the silver sh.e.l.l of her genie back over the wound to prevent contamination.

Satisfied that her new body was no longer in peril, she paused to look around. She was on the western sh.o.r.e of Atlantis. The sun hung over the waves. In another hour or two it would be night. The ocean lapping the sh.o.r.e was breathtaking, a bright shade of blue that would have looked perfect on the wings of a tropical b.u.t.terfly. When all this was over, she'd have to whip up a batch of b.u.t.terflies. She'd design them as flesh eaters the size of small eagles, but they'd still be beautiful. The required DNA chains uncoiled in her mind's eye.

Jazz stood up, wiping the sand from her silvery b.u.t.t. She craned her neck to see as much of her new body as she could. She looked good in chrome, better than she would have imagined. Despite her high-tech talents, Jazz had always possessed simple, down-to-earth tastes in fashion-blue jeans, cotton blouses, hemp sandals. Her vegetarianism had extended to eschewing leather, but she had to admit that Jandra's calf-high black boots looked good against the mirror-smoothness of her legs. The fact that they were scuffed and worn provided a pleasing contrast to the machined perfection of the rest of her. The rationale for her longstanding vegetarian ethics rested on shaky ground, anyway. She was honest enough to admit she'd long ago lost the moral high ground when it came to killing the creatures who shared the planet with her. Jandra had eaten meat her whole life. Her brain brimmed with cells programmed to enjoy the taste of fish. Perhaps it was time to try sushi.

Jazz looked up and down the beach. Not a sushi vendor in sight. In fact, the beach was empty. Six billion people lived in Atlantis, and not one could be bothered to come down to the beach on this perfect day. Of course, this beach was perfect every day. That had always been the fatal flaw of the city. After a thousand years of paradise, even the most innocent souls grew bored.

She looked up at the towers behind her. The tallest spires stretched into the blue sky, vanishing in haze, their peaks somewhere beyond the edges of the atmosphere. She saw a shadow of movement race along the sh.e.l.l-pink surface of one of the towers, miles up. She had the nanites in her retinas reprocess the photons striking them and the image sharpened. It was a man, falling, flapping his arms like they were wings. He looked as if he was laughing. Quickly, Jazz spotted another man, then a woman, all falling on parallel paths. Now that she was aware of them, she quickly spotted a hundred more. Some were laughing like the first man she spotted, but others were weeping, and still others looked as if they were screaming in terror. One by one the bodies vanished behind the screen of the lower towers surrounding the spires. If anyone was walking below, Jazz hoped they were carrying heavy-duty umbrellas.

"If your friends jumped off a building, would you?" she asked out loud, remembering the question her father had put to her over ten centuries earlier. She shook her head in disgust. It was time to get to work. She said, "Find Ca.s.sie."

Her genie responded instantly, hacking the datastream that flowed along the beach like an invisible river. In Atlantis, every cubic centimeter of air was permeated with nanites, waiting to serve the inhabitants. Her eyes zoomed back up the tallest tower, the Bethlehem Spire. A bright green circle of light flashed around a window too far away to be anything more than a speck, even with the fine tuning of the nanites. Still, she had the coordinates, which was all she really needed.

She waited a while longer, stealing more of the microscopic machines, turning in the ever-dimming sun to charge them to their fullest. Soon, her ribs felt better, with no evidence at all that she'd been a sun-dragon's chew toy. Jazz flexed the fingers of her left hand. They were fully under her control now that she'd fortified the nanites clinging to Jandra's nervous system. Her shoulder tingled as the nanites busily worked on cutting away the charred tissue they found there. On the whole, she felt back in control, not only of Jandra's body, but of everything.

She knew what she had to do to make sure she'd never lose control again.

Humming "Somewhere over the Rainbow," she opened an unders.p.a.ce gate before her.

A YOUNG WOMAN with golden skin looked up as Jazz stepped from the rainbow. The woman had glossy black hair that seemed to bubble up from her scalp like a fountain and flow down her neck and back in liquid smoothness. The woman frowned. with golden skin looked up as Jazz stepped from the rainbow. The woman had glossy black hair that seemed to bubble up from her scalp like a fountain and flow down her neck and back in liquid smoothness. The woman frowned.

Jazz smiled, until she felt movement beneath her feet. She looked down. The white sand from the beach falling from Jazz's boots were causing tiny mouths to open in the onyx floor, swallowing the grains, leaving the smooth black tile immaculate.

The entire room possessed the same sterile cleanliness. It was as big as a museum gallery, yet barely furnished-its walls were clear panes of gla.s.s, free of any curtains or blinds. The golden woman sat at a black table, or at least table top. The perfectly square polished wood hovered, unsupported by legs. A pearl-white cup and saucer sat before the golden woman, full of fluid as dark as the woman's hair. Jazz wondered why the woman was drinking ink. A memory stirred within her.

"Is that... is that... coffee?" coffee?" Jazz spoke the last word with in a reverential tone. Jazz spoke the last word with in a reverential tone.

The woman's golden eyebrows scrunched together above diamond eyes. Her lips parted to reveal pearl teeth.

"Do I know you?" she asked.

Jazz walked across the floor, trying not to be distracted by the mouths gobbling up sand that fell with each step. The golden woman held her ground as Jazz approached until they were practically touching. Jazz grabbed the cup and sniffed it. The toasted, nutty odor of coffee filled her nostrils.

"Sweet merciful Jesus, I haven't drunk coffee in seven hundred years," she said.

She took a sip. Her lips puckered at the bitterness. The receptors in Jandra's tongue weren't mapped to the parts off her brain that would find the taste pleasant. She set her nanites to work fixing that. For now, there was a mildly pleasant surge of endorphins as the hot liquid scalded her tongue.

"Jazz?" the golden woman asked.

"How'd you guess?"

"One of your identifying traits is taking things that belong to me."

"Ah, Ca.s.sie," said Jazz. "Do we really have to launch straight into the old arguments?"

Ca.s.sie crossed her arms. Her chair drifted backwards, putting some s.p.a.ce between her and her sister. A trickle of the liquid hair ran down the crease in her forehead, over her eyebrow, and down the edges of her nose. She blew it away and the liquid responded as if it was normal hair, falling to the outer edge of her cheek. She said, "I thought you died in that explosion on Mars."

"That's what I wanted you to think," said Jazz. She put the cup down and walked toward the window. Her chrome-plated skin was faintly reflected in the gla.s.s. She smiled as she realized how youthful her body looked. Her old body had been more or less frozen in development around the age of forty. Unlike the Atlanteans, she'd never had any particular fetish for looking as if she were barely out of p.u.b.erty. She'd been comfortable with her body, with its stray hairs and generous curves and the familiar sags and wrinkles. It had looked, and felt, lived in. Still, there was something about this fresh, clean body that made her spirit shiver. It was the same artistic rush she felt when she picked up a sheet of fresh white paper.

Outside the window, the distant horizon curved in a perfect arc. They were on the threshold of s.p.a.ce. The blue-gray ocean stretched out beneath them. At the edge of the horizon, the color changed as the ocean met land. She was looking at the eastern seaboard of what had once been the United States. These sh.o.r.es had once been studded with cities; now, it was a wild place, the abode of dragons. It was the crowning achievement of a long life.

Jazz leapt backwards as a man flashed past the window. He was naked, with bright red skin crisscrossed with black zebra stripes. He looked as if he was giggling as he plummeted toward the earth, many miles below.

"Jesus," said Jazz. "He scared the s.h.i.t out of me. Is there a rash of suicides in Atlantis?"

"Don't be absurd," said Ca.s.sie, rising to stand beside Jazz at the window. Ca.s.sie was wearing a simple slip of sheer black lace that clung to her almost flat chest and barely noticeable hips. Save for Ca.s.sie's unnatural height-she was easily a foot taller than Jazz now-she looked no older than twelve. "The city won't let anyone die. The bodies of the jumpers will be destroyed when they hit the ground, but they'll awaken instantly in a backup copy. The essential part of a person is nothing but information, and information is immortal."

"Ah, yes," said Jazz. "You Atlanteans change bodies more frequently than I change my hairstyle. Speaking of which, the last four times I've seen you, you've been female. You get that boy phase out of your system?"

Ca.s.sie shrugged. "The female body has ... aesthetic advantages. It supports a broader palette of colors. The male body has never looked right to me in the brighter shades."

As if to prove her point, as second man fell past the window. He was dressed like a rodeo cowboy in a fringed leather vest and chaps, but had neon pink skin that looked dumb on him. A few seconds after he flashed by, his hat dropped past.

"It's like bungee jumping without the bungee," said Jazz, tracking the hat down as far as she could.

"They say it's the ultimate adrenaline rush. If you've gotten tired of a body and don't intend to use it again, why not dispose of it in style? It's less boring than going to sleep and waking up new."

Jazz shook her head. "This is what's so wrong about Atlantis. You've let the city remove all pain and fear and worry. You've devolved into beings so jaded you have to throw yourselves off buildings to get ten minutes of feeling alive. You've been given the gift of immortality, and except for the moderately ambitious folks who went off to new worlds, you've all turned into bored teenagers looking for the next distraction."

Ca.s.sie shrugged. Her hair flowed into a new trickle along her neck. "What great goals are left? There's no hunger. There's no death. There's no fear, or want, or sorrow. Every great challenge of mankind has been solved. How are we supposed to spend our days? There are no more battles to fight."

A leopard-skinned woman in a bathing suit darted past the window, her arms pointed before her in an arrow, her feet held in perfect balance. If they still held the Olympics, this would be a 10. But, of course, any dive-all dives-could be a ten. The muscle memory for doing anything perfectly could simply be borrowed from the Atlantean datastream. Atlanteans could know everything while literally learning nothing.

Ca.s.sie pressed her forehead to the window as she looked at the world far below. She sighed. "After the struggle's over, all that's left is entertainment."

Jazz nodded. She felt a flickering pulse of sympathy for Ca.s.sie. She thought of the empty beach below. Her sister was fated to eternity in paradise with the promise-or curse-of a billion years more of the same. The rebellious, fire-bombing ecoterrorist who'd once followed in Jazz's footsteps was long gone. How do you rebel against heaven?

As quickly as the sympathy welled up, it ebbed back. Jazz remembered the real reason for her visit.

"If you thought I was dead, why did you send people to kill me?"

Ca.s.sie raised an eyebrow. "Come again?"

"Don't act innocent. I'm wearing the body of a girl named Jandra. She had an Atlantean genie and a body full of nanite enhancements. She got them from a sky-dragon named Vendevorex. I don't think Vendevorex invented the technology on his own."

Ca.s.sie smiled. "Oh! Vendevorex. Wow. I haven't thought about him in years. How is he?"

"Jandra remembers him dying," said Jazz. "Of course, we both know that could be a false memory. Jandra doesn't have any memories of meeting you, but that could have been edited as well."

Ca.s.sie shook her head as she looked out toward the darkness of s.p.a.ce that hung over the horizon. "I don't have a clue who Jandra is."

"But you know Vendevorex. How did he get the genie?"

"I gave it to him. I'm part of a debate committee to decide whether or not the dragon species should be regarded as hazardous bio-engineering waste and removed from the ecosystem."

"Atlanteans shouldn't care about that," said Jazz. "You shouldn't be able able to care about that, because the city can't care about it." to care about that, because the city can't care about it."

"I know," said Ca.s.sie. "You hacked the city to keep Atlantean technology from spreading. You made the most powerful, benevolent force ever seen on this world turn a blind eye on the continents so they could go feral. But, while the Atlantean master intelligence doesn't care about what goes on beyond these sh.o.r.es, I still do, and so do some others. You didn't hack our memories, Jazz. Some of the people here were involved in creating the dragons. They're concerned about their spread. They were created as novelties. No one antic.i.p.ated they'd become the dominant sentient species on the North American mainland."

Jazz leaned against the gla.s.s wall. "Unintended consequences are what make life interesting. But what does this have to do with Vendevorex?"

"Vendevorex was one of a handful of dragons the committee captured for study. Usually we keep them in laboratory settings, but Vendevorex was clever enough to escape. He eluded capture for three days, this on an island where even the air is sentient. I finally tracked him down. He was frightened, but also defiant. His fighting spirit stirred something inside me. He reminded me of the person I once was."

"I remember when you were a teenager. You were a real h.e.l.l-raiser." Jazz grinned. "If you'd had a few more years, I bet you could have knocked me off the top of the most wanted list."

"Thanks," said Ca.s.sie, her golden cheeks blushing rose pink.

"I didn't say it enough back then, but I liked you," said Jazz. "You were fully committed to saving earth from mankind. You were a rebel to the bone."

"There's some of that still inside me," said Ca.s.sie. "That's why I gave Vendevorex a genie and trained him to use it. I helped him escape back to North America. It was a form of rebellion against Atlantis; more importantly, it was a form of rebellion against you."

"Me? How?"

"You prevented the spread of Atlantean technology by humans. Vendevorex would have no such qualms. I gave him the know-how to build other genies. I thought he would eventually spread the technology, and get around the block you placed on the island."

"Clever," said Jazz. "But there's no way he could have linked into the Atlantean networks to make full use of the genie's potential."

"Vendevorex was smart. Since he couldn't link to a database to guide his nanites, he devoted himself to the study of chemistry and biology. His mind would be the database."

"Ah," said Jazz. "That's why Jandra has the periodic table memorized and can name every bone in the body."

"It's not as efficient as the Atlantean mind, of course," said Ca.s.sie, "but it works."

"You said you were on a committee trying to stop the spread of dragons. Why give one such a powerful tool? This is only going to lead to more powerful dragons."

Ca.s.sie looked away. However, her reflection was clearly visible on the gla.s.s. She had the faintest hint of a smug grin.

Jazz added up all the clues. "Don't tell me. You've buried a code in those genies. Vendevorex was supposed to keep propagating the genies until they reached a critical ma.s.s. They'd form their own network, one that would communicate with Atlantis, and wipe out the shackles I programmed. Atlantis would turn all of Earth into a paradise for humanity, wiping out the dragons as an environmental pollutant left over from careless genetic tinkering."

Ca.s.sie raised her eyebrows. "Wow. That's quite a guess."

Jazz looked around the big, empty, dustless room. On the opposite wall, the earth was now in darkness, and the stars shone as perfect points, untainted by atmosphere. She spotted Mars and thought about the settlers there, and the good time she'd had two centuries ago intervening in their civil war. All the people worth knowing had long since fled the earth. "Do you remember how mom used to drag us to church?" she asked.

"I haven't thought about that in a long time," said Ca.s.sie.

"I recently had a reminder of the fire and brimstone sermons. I was buried in a pit of fire, neither dead nor alive, in constant agony. If things had gone badly, it might have lasted for all eternity. It's sheer luck that I escaped. Luck and my complete lack of any moral qualms about stealing another woman's body."

"Sounds rotten. Have you decided to mend your ways?"

"No."

"No?"

"Let me show you something," said Jazz. She opened her hand. The chrome coating her palm boiled, bubbling up into a silver marble an inch across. She rolled it forward and caught it between her fingers.

"What is it?" said Ca.s.sie.

Jazz held it out. "Take a close look at the writing on the surface."

Ca.s.sie frowned, leaned forward, and squinted. She picked it up, holding it only a few inches from her face, and turned it slowly.

"I don't see any wri-" she stopped in mid-word as the gold coating her face and lips begin to crack, flaking away like the sh.e.l.l of a boiled egg, revealing pale flesh beneath.

Ca.s.sie dropped the marble. It bounced on the floor. A small mouth opened to devour it, then froze. Jagged cracks ran across the surface of the onyx tile.

"What's happening?" The metallic sh.e.l.l that coated her fell away in fine flakes. Her black silk slip now sported a sheet of scaly dust, as if she'd just developed the world's most severe case of dandruff. Her black ink hair stopped seeping from her scalp, leaving her bald, missing even her eyebrows.

"Call for help," Jazz said.

Ca.s.sie glared at Jazz, her eyes full of hate. Slowly, her features changed; hate funneled away, leaving only fear.

"It's silent," she whispered. "You've made the city go silent."

"Not yet," said Jazz. "This is only a test run. The marble is a jammer. It emits a coded radio pulse that scrambles the Atlantean datastream. You've vanished from the city's awareness. You can't even use your own genie to communicate with your nanites. I'm immune because I encoded the pulse."

"This is... this is monstrous!" said Ca.s.sie, backing away, leaving a trail of dust. He body looked pink and raw. Despite being taller than Jazz, she looked vulnerable in her girlish body, with the absurdly thin limbs that were the fashion in Atlantis. "Disabling my genie is like gouging out my eyes! You've made your point! Turn it off!"

"If I turn it off, you'll be back online, and Atlantis will know what you know."

"But... But..."

"Don't fight this. You had a good run. A thousand years. Try to appreciate the adrenaline rush."

Jazz willed an unders.p.a.ce gate to open in the air near her hand. She grabbed the edges of the rainbow, wrapping her fingers around it. Her nanites generated an electromagnetic field that let her fold the light. At the center of the rainbow, a slender black arc thinner than a human hair curved from her grasp like a scimitar.

"Have you ever seen what happens if you hit something with an unders.p.a.ce gate only a few nanometers wide?" Jazz asked.

Ca.s.sie clenched her fists. Despite the thinness of her limbs, Ca.s.sie's muscles would be finely tuned, and fast. Her nerves had been created cell by cell in absolute perfection, while Jandra's body still clunked along on the nervous system she'd been born with.

"Jazz, you can't seriously be thinking of killing Atlantis. There are six billion people here! Killing the city is the same as killing them. Not even you are that black-hearted."

"I snapped a baby's neck before I came here," said Jazz. "A scaly baby who bit the s.h.i.t out of me, but still... I wouldn't place bets about my holding onto any moral limits."

"But... why? Why is it so awful to let the city help people? The city takes care of us."

"Atlantis turned mankind into a race of eternal children," said Jazz. "I'm tired of being the world's only grownup."

Ca.s.sie lunged forward, her fist aimed for Jazz's nose.

Jazz stepped aside, twirling the unders.p.a.ce blade into her sister's path. Ca.s.sie fell past her, landing with a wet smack on the stone floor. Jazz looked down at her sister's hands, which had fallen near her feet, severed by the world's sharpest scalpel.