Ugo Piazza, Marco Bocci a small-time Milanese gangster just released from prison, finds himself immediately pulled back into trouble as old associates circle him. They suspect he stole 300,000 US dollars during a handover before his arrest, a claim he vehemently denies even under pressure from The Americano, a powerful American money launderer who wants the money back or for Piazza to resume his old loyalties. The Americano’s volatile right-hand man, Rocco Musco, Michele Placido, intensifies the pressure, and Piazza’s girlfriend, Nelly Bordon, Barbara Bouchet a go-go dancer, also believes the theft happened, pulling Piazza deeper into a web of suspicion and danger.
Piazza crosses paths with his former godfather Don Vincenzo and his sole remaining capo, Chino, symbols of a fading criminal order that still commands fear. The Americano sets an ultimatum: return the money and stay in his fold, or face the consequences. Tensions mount as paranoia grows—Rocco begins slaughtering money couriers, tightening the net around Piazza’s neck.
The conspirators set up a delicate exchange of $30,000 in a bowling alley, hoping to shake loose the truth. But a mysterious assailant in a white scarf, a figure who has stalked Piazza since his release, crashes the scene, kills their client, and absconds with the brown leather bag containing the money. The Americano orders Piazza and Rocco to hunt down the culprits, only to discover the targets are Chino and Don Vincenzo. Piazza refuses to kill his former godfather, but Rocco coldly shoots the old man, and Chino narrowly escapes. The Americano, infuriated by Piazza’s disobedience, is about to order his killing, yet Piazza manages to turn the tide by convincing him that Rocco and his crew were behind the theft.
The Americano retreats with his entourage to a rural estate, but he is ambushed and shot by a vengeful Chino. Piazza, in turn, turns his gun on the Americano’s men and finishes them off, while Chino dies of his injuries. With the immediate threat removed, Piazza travels to an abandoned church off Milan and retrieves a blue bag containing the $300,000—revelation dawning that he had stolen the money from the Americano years before and orchestrated everything to manipulate the crime lord into his own downfall. Yet fate has one more twist in store: police stop him for driving with an expired license and escort him to the station for interrogation.
In the waiting room, Piazza encounters Rocco, who is being questioned for the shootout at the Americano’s house. Seeing the bag, Rocco offers a partnership, but Piazza declines and is released. He makes his way to Nelly’s house, planning to flee with the money. Nelly, however, is entangled with Luca, one of Rocco’s crew and the man in the scarf who orchestrated the $30,000 heist. Nelly’s hidden lover Lucato had helped coerce Piazza, but the betrayal doesn’t stop with them. Luca shoots Piazza, though Piazza lands a decisive blow that kills Nelly. Rocco, who had followed Piazza home, bursts in and exacts revenge by killing Luca in a frenzy. The pursuing police ultimately drag Rocco away, leaving Piazza’s fate shrouded in the aftermath of a meticulously plotted revenge.
