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The Other Woman's Story begins as Bennett Colby (Robert Frazer) is convicted of the murder of Robert Marshall (Mahlon Hamilton). As Colby sits on death row, he recalls the events leading to his present sorry condition in a series of flashbacks. Meanwhile, the hero's sweetheart Miss Prentiss (Helen Lee Worthing) uncovers evidence that Colby's faithless wife (Alice Calhoun) was the killer. Presenting this evidence is prostitute Mildred Van (Gertrude Short), who heretofore had kept mum because she was certain no one would believe her. By rights, Mrs. Colby should take her husband's place in the electric chair, but the producers of The Other Woman's Story decided that no audience would stand to see a woman being executed, so the film ended with the homicidal wife being released in her husband's custody!