A unique incidence of insomnia plagued the populace 60 years ago, forcing people to stay up for more than a week. The victims all went insane as a result of their lack of sleep. A new treatment was created to heal this ailment, but the adverse effects converted the patients into vampires. Humanity won the struggle against this new species, but some vampires were able to survive. Mi Liu, "The Child of Hope," the primary character born of a Human and a Vampire, is to symbolise the new hope that will unite the two races. Mi Liu, the ringleader of a bank heist, is apprehended and transported to a National Defense Agency special jail that oversees Vampires. Mi Liu is attempting to break free from Anji.