 Rhoda Reynolds is blackmailed by Artie Kane for a past indiscretion, which she would like to keep from her weakling husband Carl and his overbearing father Philip. Dr. Michael Harris, who practices at the hospital where Rhoda works, offers to help but she refuses. Instead, Rhoda consults Perry Mason about the legitimacy of her present marriage but is not satisfied with the answer. Artie turns up dead, and Rhoda is charged with murder. Perry meddles with the evidence, so the case involves buzzers and bells, and a honky-tonk named "The Oryx".