What happens to Marvie Martin? She's shocked into the realization that sex is something everyone shares. After a terrifying experience in which she watches a sex act between two men-which could be enough to destroy a small town girl's mind all by itself-she is brutally raped. Her landlady throws her out, and she is befriended by Jean King, an older woman who works with Marvie. Jean seems to be a perfect roommate, loyal and loving, until Marvie realizes Jean is a swinger and sex is her life.