Six friends decide to spend their holiday together and rent a manor house in the countryside where they can leave behind the madness of the city life. Once there, they befriend the priest, Father Elia, who lives alone in the adjoining church. Very soon, the party mood turns frightening, as strange phenomena, apparently paranormal, begins happening around the group. It soon turns into a nightmare when one of the friends, Giorgio, begins acting as if he is possessed, which the group interprets as being demonic.
While Alessandro, his best friend, tries to find a scientific and rational explanation to the happenings, the other friends appeal to Father Elia, the priest, for assistance. He feels Giorgio is surely possessed by the devil, and tries to exorcise him. But in the end, what is happening is beyond their ability to understand, and moreover, their possibility to control. Is Giorgio’s possession the sign of a larger, even more diabolical phenomenon about to envelop the world?