Cleo de Nile is so excited to visit Boo York that she's pracitcally bursting out of her bandages! She's bringing her sweetie, Deuce Gorgon, and her beast ghoulfriends, plus a new fiend, pop sensation Catty Noir. The ghouls expect to have teh time of their unlives partying at a gala celebrating an ancient Egyptian artifact, the comet crystal. Cleo deosn't know it, but her sister, Nefara, is planning to trick her into making a sacred promise under the light of the comet when it passes over Boo York - a promise that will change her destiny forever! And no one knows that the comet is on a collision course with the Boo World, hurtling directly toward Boo York! It's a fangtastic, claw-biting adventure that no one will ever forget... as long as they survive the night of the comet!