The young Austrian princess Marie Antoinette is arranged to marry Louis XVI, future king of France, in a politically advantageous marriage for the rival countries. The opulent Marie indulges in various whims and flirtations. When Louis XV passes and Louis XVI ascends the French throne, his queen's extravagant lifestyle earns the hatred of the French people, who despise her Austrian heritage.

This dramatized short film describes the historical mystery of France's "man in the iron mask". King Louis XIV imprisoned a man who was never identified, but who was forced to wear an iron mask for the length of his captivity, which ended only in his death. Several candidates for the identity of the man are investigated.

Tom Turner, a naturalist, comes to the "Topa Topa" district (named for the mountain), and falls in love with widow Margaret Weston...

During a dinner party at the Brookfield family estate, private detective Craig Kennedy relates a story of one of his unsolved murder cases. What Kennedy knows, and the other guests do not, is that the person who was the killer in the unsolved mystery is in the room, and Kennedy makes plans to expose him.