Having transformed himself into a teenager to help expose a nest of vamps at school, Helsing's got no class when he joins Daisy's bullies instead. Now the gang have to stick their necks out and find the head vamp themselves.

The gang find Helsing's monster phone-book and the temptation for prank calls is too much to resist. But when their furious victim 'Frank' is revealed to be the scariest monster in the world, they must prepare the house for his all-out assault.