An ordinary family goes on a trip by car, but their car breaks down. The dutiful father of the family immediately sets off to get help and seems to find it with a nice elderly lady. The woman invites the whole family to dinner, but the hospitality soon turns out to be an ambush.

A series of murders are confounding the local police with its residue of mutilated corpses. It begins when a sadistic cult murders willing victims for entertainment. Professor Lafitte, a rich sophisticated man, whose hobby is collecting souls, leads the cult. One of his students is Jack, brilliant and obsessed with composing avant-grade music. He decides to compose a concerto for synthesizer & samplers that is based on the recorded sound of human screams. Jack is drawn into the clutches of the professor, who is guiding him into a dark path of self discovery, in his attempt to create a new kind of music.