Perry Mason defends Mona Stanton Harvey, who is accused of murdering her sculptor-husband's model, Bonnie. Unbeknown to her, her husband, Hannibal Harvey, was being blackmailed by Nonno Volente, who threatened to send Mona's love letters to him from a long-ago relationship to a scandal magazine. Hannibal has been trying everything to find the $10,000 Volente has demanded but, with Mona in Seattle tending to a sick friend, no one at the family business, Stanton Press, will help him out. Everyone there is under pressure with a lock on funds due to a fight between Everett Stanton and Rex Ainsley over the future of the company. He concocts a scheme, with Bonnie writing him a blackmail note. Mona's uncle, Everett Stanton, agrees to get him the money right away. The money is delivered but Bonnie is found dead, leading to Mona's arrest. It's left to Perry to sort it all out and find the killer.
—garykmcd