De sang-froid

During World War I, beautiful and patriotic Leslie Selden is courted by two ardent admirers: Jack Wynn, a young man not yet taken by the draft, and Dr. Wolff, a Danish scientist who is actually a German agent. When Jack learns that Wolff is masterminding a plot to bomb several munitions factories and destroy the water system in New York City, he goes to the spy's home and confronts him. Wolff locks him up, then forges a note to Leslie claiming that the young man has run away to escape the draft. Her suspicions aroused, Leslie alerts the authorities and plants a dictograph in Wolff's house, through which she learns of the scheduled bombings. Accompanied by the police, she arrives at Wolff's residence just in time to prevent Jack's murder and the destruction of the city.

During the Occupation, a woman is hired by the Gestapo as a secretary. She helps members of the national resistance in any way she can, but at the same time she faces the disapproval of her fellow villagers, who consider her a traitor.

When the Ki Kingdom falls to the invading Wimen tribes, the second prince flees the realm to a nearby kingdom. There he falls in love with a princess and attempts to set up an independant city-state

During the Civil War, young widow Rachel Hayne is among those "held by the enemy" when her old family home is within the lines occupied by the Northern troops. Protected by Colonel Prescott from looters and the unwelcome attentions of Surgeon Fielding, Rachel begins to fall in love with the gallant Yankee officer. Their romance is disrupted when Rachel's husband Gordon, long reported dead, is captured as a spy and condemned to death. When Gordon is wounded during an attempted escape, Rachel's loyalty impels her to try to save him by feigning his death. As Gordon's stretcher is carried through the hospital, Fielding demands an examination of the body, charging that Prescott is involved in a plot to smuggle the spy out of the hospital alive. General Stanton lifts the cover from the body, only to find that death has really come, freeing both Rachel and Prescott.