The building that was used as the mental hospital in this film was used several years earlier as the set for the 1966 giallo The Murder Clinic.

One of the residents, named Cheryl, is visited by her husband, Mr. Hume, who had committed her because of a suicide attempt due to her stressful job working as head of their company.

Mr. Hume talks with the clinic director Dr. Francis Clay and his associate, Dr. Austin, about the possibility of Cheryl being cured.

Anne attempts to follow the gardener to seduce him, but she is called back to her room by Dr. Austin, who counsels her about her "impulsive" and "excessive" sexual desires.

Anne is visited by her brother, Peter, and wants them to return to the 'affectionate' ways they together had as children, and clearly has sexual feelings for him.

Later that evening, as the attendants and patients sit in a room to mingle and play cards and board games, Anne sneaks out the front door and runs to the greenhouse.

As Mara looks out of her window, the killer fires a crossbow, hitting her in the neck with an arrow, killing her instantly.

The police and medical attendants remove the bodies of Anne, Ruth, Mara, and the other nurse from the area, but they are angry that Dr. Austin moved some weapons and tried to keep the killings a secret, thus making him an accessory after-the-fact.

Hume knocks out two of the cops chasing him and upon running into a room to hide, discovers all of the clinic's female nurses in it.

[4] There is also a version released in France under the title Les insatisfaites poupées érotiques du docteur Hitchcock containing explicit sexual scenes.

[7] McGillivray found the film to be a "crude and meretricious Italian murder mystery" with "a great many killings (all clumsily presented without a trace of suspense) are interspersed with regular doses of sex, and the director has an annoying habit of regurgitating a good percentage of the footage each time a character recalls a past event.