Realizing she must protect her family, Sadie relents, accepting her destiny as a Vampire Slayer. When Aaron is attacked, it's up to her to learn how to take down the vampires. Learning that the man and vampire protection treaty was violated, Sadie realizes that only Slayers can restore world balance . The Training Institute will transform her into a Vampire Slayer. In no time, Sadie discovers that she is stronger, faster, and swifter than any of the other candidates; she is the ultimate slaying machine. But why?