Rudolph has problems. Not only is he thirteen years old and a vampire, but his whole family is threatened with extinction by the cruel vampire hunter Rookery. Rudolph fortunately encounters twelve year old Tony, a human. Rudolph brings Tony along on his adventure, which takes the two boys to Transylvania, and brings their two families together, helping them overcome their prejudices against each other. Along the way, they face numerous dangers, and both vampires and humans must show courage and ingenuity. United, they manage to vanquish the evil vampire hunters and free their relatives at last.