Having lost her parents to an unfortunate accident, which led her to live with a bastard of an uncle, Maria takes her own life out of despair. However, God pitied her and chose to reincarnate her. Parts of her memories were locked away without her knowledge in order to protect her frail mind. She awakens as a young princess of a small kingdom, that is under threat of invasion from the demonkind. Vowing to protect both her kingdom and her newfound family, Maria decides to take on the mantle of a knight with her own hands. In doing so, she is determined to cope with the dangers and mysteries of this new and strange world, while meeting new people who will forever change the course of her destiny.