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Perry Mason (Raymond Burr) is in Reno, helping Pete Warren (Peter Breck) finalize his divorce from his wife Myrna. When an incriminating photo reveals that Myrna (Myrna Fahey) is mixed up in a counterfeit gambling-chip scam at a local gambling casino, Pete tells a pack of lies to the authorities to save his soon-to-be "ex" from prosectuion. Before long, Pete is facing a far more serious charge than counterfeiting: Myrna has been murdered, and all the evidence points to him.