Directed by Enzo G. Castellari. With Franco Nero, Sybil Danning, Mario Maranzana, Licinia Lentini. An American narcotics agent is murdered in Italy. The head of the department decides to hire Larry Stanziani, 'The Cobra'. Larry, a former agent and now a third-rate private detective, uses the opportunity to get even with an old enemy, but soon he finds out he's facing a relentless organization.