A top undercover cop finds and arrests a series of purse snatchers until he discovers an American at the top of an evil ring of thieves.

Ponziani Armando, the owner of a thriving chemical industry, lives in a beautiful villa on Lake Como with his wife and his son Franco Ersilia.

A tough, violent cop who doesn’t mind bending the law goes after a machine-gun-carrying, hunchbacked psychotic killer.