The film stars Kent Taylor, Irene Hervey, Henry Stephenson, J. Edward Bromberg, George Zucco and Charles Wagenheim.

[1][2][3] Jonathan Peale, a renegade Nazi spy, is aboard a Rangoon-bound train, carrying a map containing the locations of China's main munitions dumps.

He is watched on the train by Gestapo agent Karl Zerta and his aide, Otto Van Shocht, who both fear that Peale may decide to sell the map to the highest bidder.

The two rekindle their love and agree to meet later that night in Alexander's compartment, after Nicolas, the rajah's matrimonial scout and Vicki's personal guard, has fallen asleep.

Zerta and Otto soon find themselves in a poker game with Alexander, Jonathan and Colonel Blimpton, a retired British army officer.