The Whistler, mysterious narrator of the radio series of the same name, "knows many things" for he "walks by night." This time the unseen whistler knows all about mentally disturbed artist Richard Dix, whose first wife died under mysterious circumstances. Wife Number Two (Leslie Brooks) begins to suspect that Dix's earlier spouse may have been murdered, and that the artist was the killer. In a tense finale, the second wife uses psychological warfare to turn the tables on the homicidal Dix. This was the sixth in the film in the "Whistler" series produced by Columbia in the mid-1940s.
by Hal Erickson synopsis