An Italian film from 1943.

A troupe of beautiful dancers find themselves stranded in a sinister castle, not knowing it is home to a group of vampires.

Widowed at the age of twenty, Madame Boissière is a real mother hen, excessively brooding over her two sons Robert and Claude. She spoiled the marriage of one and kept the other away from any female presence. The latter runs off and marries a girl from the mountains. When his brother dies, the couple agree to return to live with Madame Boissière, who tries to separate them.

The owner of a high-tech heating mechanism is being forced by gangsters to help them in a plot to steal gold ingots. An ex-secret agent is called in to search for him and stop the criminals.