Bitten by a vampire after being mistaken for her Goth twin sister, Rayne, sixteen-year-old Sunny is in a race against time as she tries to prevent herself from becoming a vampire permanently.

Rayne McDonald, a goth vampire and vampire slayer, must go undercover as a cheerleader at her high school to find out what happened to the captain of the football team, who has disappeared, and to see if the peppy cheerleaders are really werewolves.

After learning that their ex-hippie parents are actually fairies, vampire Rayne and her twin sister Sunny are forced to hide out in a secluded Swiss boarding school for vampire slayers that, the twins discover, is hiding some secrets of its own.

When Rayne is chosen to track down her twin sister, Sunny, and Sunny's vampire boyfriend, Magnus, for what will mean certain death at the hands of the Vampire Consortium, she and her boyfriend Jareth go deep beneath New York City and through the Gates of the Underworld in hopes of saving them.