AllMovie

Mayor Henderson (Arthur Franz) is up for an appointment to the state crime commission, but he is danger of being sabotaged by his overambitious wife Mona (Patricia Huston), who has been purloining city plans and passing them along to crooked real estate agent Tom Stratton (Edward Platt). Now Stratton is blackmailing Mona, hoping to enrich himself at Henderson's expense. When Mona is murdered, however, Lt. Tragg (Ray Collins) bypasses both Henderson and Stratton and arrests Susan Connolly (played by future Oscar winner Louise Fletcher) for the crime. Thank heaven that Perry Mason (Raymond Burr) is on hand to expose the real killer.