Christine Faber (Lynn Bari) is a wealthy widow whose husband Paul (Donald Curtis) allegedly died in a boating accident two years ago. The emotionally unbalanced grieving widow hears from her beach house balcony the voice of her former hubby calling out from the ocean for her not to marry the lawyer Martin Abbott (Richard Carlson). When Christine walks along the beach she's approached by phony medium Alexis (Turhan Bey), who provides her with personal information about her husband that convinces her he can communicate with the dead and she becomes a regular customer. This is to the chagrin of her younger sister Janet Burke (Cathy O'Donnell) and Martin. The lawyer boyfriend hires a private detective, Hoffman, to check Alexis out, and Janet is sent over to Alexis' to pretend to be a client in order to get fingerpints. In the meantime the detective discovers that Alexis served prison time for a previous con artist scam.