Ireland in the sixties: Four women are given into the custody of the Madgalene sisterhoood asylum to correct their more or less sinful behaviour: Crispina and Rose have given birth to a pre-marriage 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.