First Yank into Tokyo

Steve Ross returns to San Francisco after the bombing raid on Tokyo. He reminisces about his lost love Abby Drake, and his leave is cut short when he is ordered to report to Washington for a top-secret mission.

In Washington, he is recruited for a covert mission and agrees to undergo plastic surgery to pass as a Japanese soldier. His upbringing in Japan and fluency in the language make him a valuable asset for infiltration. He prepares for deployment to begin the operation.

He is sent to a city near Hong Kong and is shipped back toward Japan after a discharge for battle shock. As the ship nears Tokyo, he makes a daring jump overboard and swims to shore. He walks to the Kamuri concentration camp where Jardine is being held.

At Kamuri, Steve is assigned to the supply depot and befriends Haan-Soo, a Korean underground helper. He learns Jardine has been hospitalized with black fever and arranges to transfer to the hospital by bribing Major Nogira.

Abby Drake has been captured and is serving as the head nurse in the hospital. Steve uses his newly assigned post to reconnect with her and begins planning contact with Jardine.

When Jardine returns to the hospital, Steve convinces him that he is an American agent in disguise. The two men solidify their contact and begin coordinating their escape plans. Haan-Soo plays a crucial liaison role behind the scenes.

Okunura makes a move toward Abby, who rejects him. Nogira is accused of theft, demoted, and ordered to commit suicide by Okunura. Nogira complies, removing himself from the camp while Okanura pivots to accuse the nurses of his death.

Okanura orders Steve whipped for insubordination, and Abby tends his wounds afterward. The ordeal deepens the tension between them, and both grapple with confusing emotions amid the war's pressures.

Steve confesses to Jardine that he and Abby were engaged and that her nurse's badge actually bears his wings. The trio devises a rapid escape plan to break out before Okanura can uncover Steve's true identity. Jardine commits to helping, reinforcing the trust between them.

Haan-Soo proposes using an explosion at the munitions plant as a diversion to cover their escape. Jardine agrees that triggering a blast would disrupt the camp's security and aid their flight.

Under the ruse of delivering an officer to a party, Steve drives to the commander's house with Jardine hidden in the backseat. Abby is sequestered inside, and Okanura is about to violate her when a watchdog chase reveals Steve's true identity to the officers. The munitions plant explodes, toppling officers to the floor and altering the balance of power.

Steve defeats Okanura and finally reveals his true identity to Abby. They flee with Jardine toward the beach as troops close in, seeking an exit from the camp. Their escape is aided by Abby's resolve and the allies they’ve kept close.

On the beach, Haan-Soo joins Steve to hold off pursuing soldiers while Abby and Jardine sail to safety. Steve and Haan-Soo sacrifice themselves to enable the deployment of the atomic bomb, underscoring the film's message of peace with goodwill toward men.