The world's worst nightmare has come true: Andrew Bennett, the only good vampire, has gone very, very bad! Now it's up to his lover Mary, Queen of Blood, to stop him - but she's human now! Now, she must embark on a quest to learn the truth about Andrew's past and which vampire turned him. But the problem is, it's the most deadly vampire in existance: Cain! It collects issues number 0, and numbered 13-18 of I, Vampire.