Darren Shan (Chris Massoglia) is a high school student with excellent academic performance and youthful sunshine. He is very popular in school and has a happy family, so he is called "Mr. Perfect" by his friends. One day, a flyer changed the direction of his life. A circus that includes all kinds of weird things came to his town. Although his parents and teachers forbade it, Darren still went to watch it secretly with his vampire-obsessed friend Steve (Josh Hutcherson). The unheard-of strange people and strange things made the two boys excited, and the appearance of vampire Laden Kressley (John C. Reilly) and his poisonous spider touched them. After the show, Darren stole the spider. Steve, who was resentful because he could not become a vampire, failed to kill the spider and was poisoned instead, and was in danger. In order to save his friend, Darren had to become a half-vampire and become Laden's assistant. He began to experience a fantasy journey... This film is adapted from the work of the same name by Irish novelist Darren Shan.