France, 1803: 11 years after the Revolution, a royalist underground is led by a new 'Scarlet Pimpernel', the Purple Mask, who rescues nobles in distress and kidnaps Napoleon's officials for ransom, aided by the spy services of a group of lovely models headed by Laurette (really the Duc de Latour's daughter). But even she doesn't know the Purple Mask's real identity as foppish dancing master Rene...

Juile, an airline hostess, has her mind made up to marry South American millionaire Rico Vargas, in spite of the efforts made by her former boyfriend, Lee Darling, a television star, to win her back. Rico's sister, Astra, makes a play for Lee, who only responds to make Julie jealous. As the plane bearing Juile and others (includng all the credited musicians and bands) is about to depart, Herb Jefferies smuggles Lee on board so he can have a chance to dissuade Julie.

A privately-financed scientist and his colleagues hire an ex-Navy officer to conduct an Alaskan submarine expedition in order to prevent a Red Chinese anti-American plot that may lead to World War III. Mixes deviously plotted schoolboy fiction with submarine spectacle and cold war heroics.

In the winter of 1938, Paris is crowded with refugees from the Nazis, who live in the black shadows of night, trying to evade deportation. One such is Dr. Ravic, who practices medicine illegally and stalks his old Nazi enemy Haake with murder in mind. One rainy night, Ravic meets Joan Madou, a kept woman cast adrift by her lover's sudden death. Against Ravic's better judgment, they become involved in a doomed affair.