Allison Sekemoto lives inside a city controlled by vampires. Choosing to be an Unregistered, she is given the freedom to not give her own blood to the vampires at the cost of having to find her own food. While out searching for food with her friends, they are attacked by a bunch of rabids and Allison is left mortally wounded. A vampire who witnesses this, Kanin, gives her the option of becoming a vampire or dying as a human. Allison is turned and is taken under Kanin's wing. Beginning her training under him, Allison is left alone when they are attacked while on the run from Kanin's enemies. Stumbling across a group of humans, Allison joins them and begins to fall in love with Zeke but struggles to hide her true identity from them.