A couple invites some friends to spend a weekend together in an isolated cabin surrounded by woods and fields. But... there's a killer lurking around.... And... someone is monitoring him.

Pino Scalise discharged from the prison he was in for robbery, take refuge in Milan at the home of his uncle. Pino falls in love with one of the uncle's two daughters, who has become a prostitute because of Don Ciccio, head of a gang that traffics in drugs. Pino, now an informer to Police Commissioner Morani, makes plans to take the boss down.