Based on the best-selling novel by Tiffany Thayer, Thirteen Women, features a vengeful killer stalking members of a sorority, all of whom had attended St. Albans Seminary in northern California. Several years after graduation, the women start sending letters to a famous Swami for their horoscopes. Unbeknownst to the women, the Swami is under the influence of their former classmate, who re-writes the horoscopes in order to exact her revenge on the sisters who refused to allow her to join their sorority. This is the first and only film appearance of Peg Entwistle.