The unorthodox teaming of Vivien Leigh and Conrad Veidt is but one of the many pleasures of the 1937 spy yarn Dark Journey. Leigh plays a Stockholm dress-shop owner during World War I, who, being a neutral, is permitted to travel unmolested to and from France. Veidt plays a supposedly disgraced German officer who is actually head of his country's secret service. The two fall in love, despite the fact that Leigh has a secret as well: she is a double agent, sympathetic towards the Allied cause. During one of Leigh's voyages to France, her ship is captured by a German U-boat. Veidt swaggers on board, threatening to sink the ship if Leigh is not turned over to him. But the circumstances reverse themselves, and Veidt finds himself Leigh's prisoner--a circumstance that is not altogether unpleasant for him. When originally released in England, Dark Journey bore the title The Anxious Years.
by Hal Erickson synopsis