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There's no shortage of suspects when vitriolic society columnist Mary K. Davis (Marian Seldes) is murdered. Even so, the police charge the dead woman's nurse Leona Walsh (Josephine Hutchinson) with the crime...mainly because Leona has given a full confession to DA Hamilton Burger (William Talman). Inasmuch as Leona's lawyer is Perry Mason (Raymond Burr), she is of course not guilty, but Perry has a tough time proving it--and to make matters worse, Burger intends to discredit Mason in court by calling his secretary Della Street (Barbara Hale) to the stand to testify that her boss has tampered with the evidence! This episode is based on a 1957 novel by Perry Mason creator Erle Stanley Gardner.