Four women spending the night in a deserted sanitarium on a mountain fall into the hands of an evil doctor with a terrible secret.

A recent widow has invited a group of family friends to her large and secluded country home. However, what the guests don't know is that the reason they've been assembled is that their host suspects one of them might be her husband's killer and she's intent on uncovering the identity of his murderer. As the guests begin to suspect each other, revealing long-kept and sinister secrets in the process, an unknown, black-gloved killer begins bumping them off in a variety of nasty ways.

A hunchback working in a morgue falls in love with a sick woman. He goes berserk when she dies and seeks help from a scientist to bring her back from the dead.

Berta, imprisoned in Franco's Spain on fraud charges, learns to navigate the indignities of prison, spreading her own brand of kindness and empathy to the other inmates, but she unwillingly learns a valuable lesson when she falls in love with one of them.