Sonny, a New York wise guy, dreams of becoming a feared gangster. He runs errands for the mob and is rewarded by being given the control over Mulberry Street, which is a street that faces a boxing gym.

Rome, 1977. Luciano Baccarini, married to the rich Irene Oro, is murdered at home while preparing a romantic dinner on the terrace for his lover. The investigations immediately focus on the man's private life.