The investigators track down a mysterious killer who preys on waitresses but not in time to prevent the death of a young girl employed by a woman restaurant owner (Jane Wyman.)

Maggie Peters becomes romantically drawn to the insecure young heir of a factory fortune as she investigates a mysterious series of fires in a New England industrial town. Female investigator Mary Murphy discovers that it's difficult to remain impersonal when she becomes acquainted with an insecure young heir to a factory fortune. In her attempt to unravel the mystery behind a series of fires, the pretty detective runs into some pitfalls.