The clumsy vampire hunter Edgar Frog is evicted from his trailer and agrees to help the best-seller writer Gwen Lieber to rescue her brother who disappeared 2 years ago in a rave. They discover that the head vampire DJ X takes responsibility for this and he plots to increase his army of undead by giving people a drug called "The Thrist" which can turn people to half-vampires. Edgar has come to his half-vampire brother Alan and ask for his help to save the future of the entire human race.