Martha Beck (Shirley Stoler) is a lonely nurse who takes care of her invalid mother in Mobile, Alabama. Starved for affection, she places an ad in a lonely hearts column and soon receives a letter from Ray Fernandez (Tony LoBianco). He meets her and runs off with her dowry to New York City. Martha puts her mother in a nursing home and follows the handsome con artist. She agrees to pose as his sister as the two fleece lonely, unsuspecting women out of their money. Martha's jealousies of Ray's victims leads to murder. In Grand Rapids, Michigan, an elderly matron is killed and her child is drowned in a washing machine. Martha considers confessing to the police when she finally realizes Ray will never be true to her or any other woman. The story was taken from actual events, and the real-life couple were eventually executed in Sing Sing prison in 1951. The black-and-white photography adds an aura of authenticity to the documentary-style production.