John Royer returns to the United States in January 1942, a pivotal moment just after the country enters World War II. He seeks out his friend, John Manchester, a newspaper publisher, to discuss a daring scheme: smuggling urgently needed rubber out of Japanese-occupied Malaya. Although Manchester has been tapped by the government to handle the rubber shortage, he isn’t eager to jump into action. A government agent, Kellar, pushes Royer toward a meeting with Manchester and other officials, and finally grant is given to move forward with the operation.
To pull off the risky plan, Royer enlists his old ally, Carnaghan, a hardened smuggler who is released from Alcatraz specifically to help. The pair slip into Malaya and reconnect with The Dutchman, the saloon owner who can recruit a crew from his customers, including Romano. As the partnership rekindles, Carnaghan also renews his connection with the Italian singer in the joint's orbit, the captivating Luana Luana.
With capital, leverage, and menace, the group buys up all the available rubber, using money and intimidation to secure the precious cargo. But their operation draws the attention of the Japanese commander, Colonel Tomura, who is determined to stamp it out. During the final trip to move the remaining rubber—the property of German plantation owner Bruno Gerber—an ambush appears imminent. Carnaghan, sensing danger, refuses to take Royer along, and the two men part ways in a tense moment of loyalty and suspicion. The attack comes as the boats are struck by machine-gun fire, and the boats, including the one carrying Royer, are overwhelmed and slaughtered.
The story shifts toward a grim finale as Tomura hints that he could overlook the stingy plan if offered gold, but [The Dutchman] believes such a bribe is impossible to buy. Carnaghan nonetheless accepts Tomura’s terms and, together with Romano, hatches a plan to outmaneuver the Japanese commander even if it renders them as “angels” in a dangerous game of betrayal and survival. In a desperate act, Luana volunteers for the risk, climbing aboard the smuggled vessel in what seems like a suicide mission. Carnaghan drives the scheme forward, forcing Tomura into a confrontation on the hidden freighter.
The climactic moment arrives as Carnaghan shoots the guards and defeats Tomura, pulling himself onto the gunwale just in time to witness the two PT boats sink the Japanese warship. Wounded, he collapses from exhaustion, a solitary silhouette watching the island’s battle end in a dramatic turn of fate.
In the aftermath, the island earns a new symbol of allegiance—the Australian flag rises where the Japanese ensign once flew. Kellar revisits the Dutchman’s bar and confirms the search for Carnaghan, who has vanished with Luana on the island. The government investigator describes a medal offered to the smuggler; Carnaghan, honoring his own code, rejects the gesture and sends the medal back to the Dutchman, a quiet emblem of a life spent in the shadows of war and survival.
