Francis Foster—last of the liver-eaters, a 16th century warlock and all-around nasty piece of work—has developed an addiction to killing people. He's been doing it for 500 years or more, body-swapping left, right, and center when needs must, and starting a new serial killer's reign. But he bites off much more than he can chew when his soul-transference ritual goes wrong and he ends up in the body of a dachshund. Now that he's a dog, he can't say or do the things he needs to do to perform the magic to hijack someone else's body, and that's where Tommy comes into play.

Tommy is The Boy Who Sees—well, that was his title before he ran away from Ray Greenfield's psychotic circus. Tommy is psychic and can understand Frankie's dilemma but refuses to help the possessed pooch continue his evil deeds, especially when the next body in question is one Tommy's been admiring for several years.

Georgina and her best mate Suki aren't like normal women their age. They're geeks: dirty-minded, emotionless freaks who want nothing better than to curl up with the latest Junji Ito whilst a gruesome serial killer documentary plays in the background. However, their usual routine is thrown off when Georgina's dog starts acting weird after an unusual circus comes to town and she is attacked at the kennels she works in. Their friend goes missing, so they decide to play Scooby-Doo (they're Velma and Shaggy, as neither wants to be Daphne) and get to the bottom of the strange goings-on.

Frankie is well and truly screwed. He's trapped, becoming more doglike by the day, and something from his past is traveling with this demented circus that not only has the power to devour him but quite possibly the entire universe.