Across the Pacific

On November 17, 1941, Captain Rick Leland is court-martialed and discharged after being caught stealing. He tries to join the Princess Patricia's Canadian Light Infantry but is rebuffed. He then boards the Genoa Maru, a Japanese-bound liner leaving Halifax for Yokohama via the Panama Canal and Hawaii.

On the Genoa Maru, Leland meets Alberta Marlow, and a light romance begins between them. The other passengers include Dr. Lorenz and his servant T. Oki, whose backgrounds hint at the coming conflict. Lorenz's pro-Japanese sympathies foreshadow trouble.

During a stop in New York City, Leland is revealed as a secret agent when he reports to Colonel Hart. Hart warns him to watch for the Japanese criminal Joe Totsuiko and questions Marlow's loyalties.

Back on board, Leland foils a Filipino assassin who is about to shoot Lorenz. He remains calm and allows Lorenz to have the man killed, which earns Lorenz's uneasy trust and complicates their alliance.

Totsuiko boards the ship as a wise-cracking young Nisei, while a different man later returns as T. Oki. Lorenz pays Leland in advance for information about Panama Canal defenses, tying Leland to the spies' plans.

In Panama, Captain Morrison announces that Japanese ships are denied entry to the Canal, forcing a detour around Cape Horn. Leland, Marlow, and Lorenz wait for another vessel at Sam's hotel, while crates addressed to Dan Morton are unloaded. Lorenz demands up-to-date air patrol schedules.

On December 6, 1941, Leland meets with his local contact A. V. Smith and persuades him to provide real timetables instead of the fake ones. Smith also reveals that Morton is a wealthy dipsomaniac and that Marlow is a buyer for Rogers Fifth Avenue in New York City.

Leland hands over the schedules and is brutally beaten. He revives hours later and immediately calls Smith, warning him to change the patrol schedule; Smith is killed after Leland hangs up. Lorenz and Marlow vanish from the scene, leaving the conspiracy in motion.

Sam sends Leland to a cinema, where a man whispers 'Go Bountiful Plantation...' before being killed. The cryptic message foreshadows the plantation trap that awaits him and his allies.

Arriving at the plantation, Leland sees a torpedo bomber being prepared for action. He is captured and brought before Lorenz, with Totsuiko, Marlow, Morton, and a second T. Oki present, who is revealed to be a Japanese prince and pilot.

Morton, whose weakness is exploited by the enemy to gain a base for their activities, is revealed as Marlow's father. He staggers to his feet, but Totsuiko shoots him, a move that inadvertently enables Leland to overpower Totsuiko.

Outside, Leland seizes a machine gun and shoots down the bomber as it attempts to take off, dispatching Lorenz's henchmen in the process. The assault cripples the enemy plot and clears a path for escape.

In the house, Lorenz attempts seppuku, but his nerve fails him. Leland refuses to kill him, telling Lorenz he has a date with Army Intelligence. Leland and Marlow clasp hands as American planes fill the sky above them.