Lynn Markham (Crawford) visits a beach house that once belonged to her dead husband. There, she meets real estate agent Amy Rawlinson (Jan Sterling) and Drummond “Drummy” Hall (Chandler), an attractive beach bum who wanders in and out of the house as though he owned it.
Lynn learns the house was once rented to Eloise Crandall (Judith Evelyn), an older woman whose cause of death (suicide, accident, or murder) remains undetermined. Lynn later discovers “Drummy” is the accomplice of card sharps Osbert and Queenie Sorenson (Cecil Kellaway and Natalie Schafer), and that he heartlessly pursued Crandall in order to set her up for card games with the Sorensons.
Lynn’s physical attraction to Drummy is overpowering and she marries him. Events on their honeymoon lead Lynn to believe he murdered Eloise. It transpires, however, that Amy Rawlinson killed Crandall because she wanted Drummy for herself.