When she takes up her new post at an eerie convalescent home deep in the French countryside, nurse Martine soon discovers that several missing co-workers may have fallen prey to an unspeakable evil rumored to roam the hallways at night. But as Martine looks deeper into the mystery, she suspects the home's aged residents know more about the menace than they let on.

A Paris-based doctor tries to spread the gospel of Natural Childbirth. Working in a cloistered rural community, Gabin runs up against the stone walls of fear and prejudice. His theories are proven sound when unwed mother Nicole Courcel gives birth within Gabin's methodology. The childbirth sequence is filmed straight-on with a delicate combination of taste and frankness. Nonetheless, the lurid ad campaign of Cas Du Dr. Laurent sensationalized this sequence all out of proportion.