Uma família lutando contra a perda encontra-se à mercê de um antigo demônio tentando destruí-los por dentro.

To free Baba Yaga and Renfield from the clutches of Monster Hunter Mila Starr, the Wishbone Family once more transforms into a Vampire, Frankenstein's Monster, a Mummy and a Werewolf. Aided and abetted by their three pet bats, our Monster Family zooms around the world again to save their friends, make new monstrous acquaintances and finally come to the realization that 'Nobody's Perfect' - even those with flaws can find happiness.