A zealous, handsome priest, who is the confessor for a convent full of women, encourages the equally zealous abbess of the institution to enforce strict rules on these unfortunate women. At the same time, a particularly disturbed nun manages to poison herself and many of the other novitiates in yet another scandal which is covered up by church authorities.
While searching for their estranged mother, two beautiful sisters, Dagmar and Ursula, arrive at a luxurious seaside hotel. At the same time, a mysterious killer starts murdering promiscuous women in the area.