When her no-morals mom takes her own life, a young siren named Lucy (played by Linda Hayden) moves in with one of her mother's lovers, a physician who is may be Lucy's father. Lucy is out for revenge against her doctor dad for deserting her mom and not fessing up to his papa part. She unleashes her considerable charms on his entire family and soon has the doctor, his son, and the doctor's wife all swooning over her.