The vampire Count Gracula (whose surname is a pun on that of Count Dracula) and his bat friend move into the aliens' house on the night of Hallowe'en, and after the former bites Gorgious, he becomes a vampire himself, so he soon bites the other aliens to turn them into vampires as well. Count Gracula, his bat and the aliens then try to bite other people to turn them into vampires but fail.
Pendant la nuit d'Halloween, les Zinzins découvrent une étrange caisse dans la cave de leur maison : elle s'entrouvre aux douze coups de minuit.
