A woman is married to the son of a doctor, the proprietor of a private sanatorium, where she is under unwilling treatment. Both the son and the doctor indicate they want the marriage dissolved. Arriving at the scene is a mysterious personage identified as the doctor's cousin who formerly was a stage magician in Europe. He is accompanied by a threatening dwarf.

Don Gallico is an inventor of stage magic effects who aspires to become a star in his own right. Just before his first performance his act is shut down by capricious manager Ross Ormond who wants Gallico's brilliant buzz saw effect for the act of The Great Rinaldi, an established star. With this defeat, and the humiliation of having already lost his wife Claire to Ormond, Gallico decides it is time to take matters into his own hands.

During the Nazi occupation of Poland, an acting troupe becomes embroiled in a Polish soldier's efforts to track down a German spy.

Julia Ross secures employment with a wealthy widow and goes to live at her house. Two days later, she awakens in a different house in different clothes and with a new identity.

A carnival showman tries to keep Japanese spies from sabotaging the Panama Canal.

Spies on opposite sides fall in love in pre-revolutionary Russia.

A former Navy man attempts to redeem his honor by exposing a shipping tycoon's dealings with the enemy.

After the mysterious disappearance of a German soldier from a Prague cafe, the staff and customers are held captive by the Nazis accused of murder and collusion with the Czech resistance.

June McCarthy has unwittingly aided an undercover Nazi naval officer with acquiring a "mother ship" for German submarines in the Atlantic.