When a childless couple learn that they cannot have children, it causes great distress. To ease his wife's pain, the man finds a stump in the backyard and chops it and varnishes it into the shape of a child. However the woman takes the root as her baby and starts to pretend that it is real. When the root takes life they seem to have gained a child; but its appetite is much greater than that of a normal child.

A horror movie testing two approaches to running an insane asylum - absolute freedom versus control and punishment - within the context of a world that combines the worst of both. Jean Berlot, a young man subject to a nightmare of being forced into a straitjacket by two orderlies, is befriended by a marquis. At the marquis's estate, Jean witnesses a black Mass, buries someone alive, and is invited to try preventive therapy. He's willing to enter a sanatorium because he believes he can rescue a young woman from there who has told him that the real director and staff of the clinic are locked in the basement. Jean conspires with her to set them free: the horrors have only begun.