Contagious summary: Contagious continues the story of 2008 's Infected, predominantly following characters Perry Dawsey and Margaret Montoya as they attempt to stop an alien infestation of 'hatchlings '. Dawsey, former Michigan linebacker, has survived the events in Infected, but remains telepathically linked to the aliens. His insight into the aliens ' behaviors help the government hunt them down, and Dawsey is forced to partic.i.p.ate.