 Four women are given into the custody of the Madgalene sisterhood asylum to correct their more or less sinful behavior: Crispina and Rose have given birth to a premarital child, Margaret got raped by her cousin and the orphan Bernadette had been repeatedly caught flirting with the boys. All have to work in a laundry under the strict supervision of the nuns, who break their wills through sadistic punishments. Some of the inmates develop countermeasures, while others perish under the treatment.