Because of a rainstorm, five young people – Franco, Paola, Riccardo, Antonella and Luciano – take shelter in an old church in the [Italian] countryside. During the night, Luciano falls into a hole full of skulls. Among them, there is the skull of a vampire. Luciano does not say anything to his friends but, when he later goes back to the hole, the skull of the vampire has disappeared. Luciano discovers that he has two marks on his neck and believes that he has been vampirised. Upon their return to the Black Cat Inn, Franco, Paola, Riccardo, Antonella and Luciano talk about the old church and are baffled by the reaction of Rosetta (a chambermaid) and Maria and Giulio (the owners of the inn). Menica, an old woman from a nearby village, explains why everybody at the inn is afraid of the old church. Luciano is impressed by Menica's explanation and, due to telaesthetic [sic] phenomena, he becomes convinced that he is the perpetrator of the crimes that the actual victim of the vampire is committing. It is only at the end of the film that Antonella tells Luciano the truth. At first, Luciano does not believe her, then he understands everything and destroys the skull of the vampire in order to free Antonella from the monster. However, by destroying the vampire of the old church, Luciano has also put an end to Antonella's life. The young man takes the dying girl in his arms.