A detective attempts to clear his girlfriend's brother of a murder rap and find the real killer. In the process he uncovers the hidden workings of the city's seedy underworld.

Pursued by the Germans after the assassination of Reinhard Heydrich, Dr. Svoboda enlists the aid of a young woman who is oblivious to the lethal crosscurrents that surround her in Czechoslovakia. As she learns more about the mysterious doctor, she grows aware of the involvement of her father and fiance in the resistance, and soon finds herself entangled in the revolution's secret operations.

Brenda Marshall stars as Nora Goodrich, a scientist working on an anesthesiology project. Her lab partner sabotages an experiment leaving Nora's face badly scarred. After her face is surgically altered, she plots revenge on her enemies.