José María Ferrer

A group of people take shelter from the storm in an old spa served by a marriage and a servant. It is a very diverse group, highlighting a man who, with his wife, carrying a briefcase full of money. At night, at dinner in honor of the newcomers is a power outage and shortly afterwards, they realize that the man with the briefcase has been murdered.

A salesman discovers that his wife has died under strange circumstances. Examining these circumstances, it becomes obvious to him that they were mainly caused by himself.