Barry Conrad has become a major star with an oversized ego. At the last moment, he tells his producer, Jackson Sidemark, that he won't be signing a new contract. Conrad, then Sidemark, are killed giving Perry two clients back-to-back.
In a very rare occurrence, Perry Mason loses a case when Janice Barton is convicted of murdering her aunt and is subsequently sentenced to death. After the verdict, Perry still investigates to try to find the real killer among the heirs.
Perry Mason finds himself defending his private investigator Paul Drake against a charge of murder. It all began when Frank Thatcher hit a pedestrian walking on the side of the road and kills him. He hires Paul to payoff the widow.
John Brooks arrives at the elderly Stone sisters' home saying he knew a nephew who was declared illegitimate as a youth. Due to his recall of facts they think he is really their nephew. Ernest Stone is murdered in a tangled web of deceit.
Della is on the hook to Perry for $25,000 but more importantly may go to prison for helping a friend charged with murder who was being blackmailed. Perry must not only prove his client but his trusted secretary innocent as well.
Janice Wainwright is a dedicated secretary to Morley Theilman who becomes concerned when she learns he is being blackmailed. Perry advises her to follow through with her instructions but it results in her being charged with his murder.
As Perry prepares to go to Scotland on vacation, a little girl arrives in his office asking him to determine who she is. His search takes him to Switzerland where he meets a woman who becomes his client after a murder.
Perry and Della are enjoying a quiet dinner at Morey Allen's restaurant when a waitress suddenly runs out and is hit by a car, shots are fired, and Perry is left holding a moth-eaten mink with a pawn ticket hidden in it.
Walking down the street, Korean War veteran Arthur Poe is shocked to see a book about the war displayed, 'written' by Ben Sutton who was with him in the war. The book is a bestseller but is actually based on a diary Poe kept in the war.
A dazed woman found in a park in a raincoat says she has amnesia but her story makes no sense. She supposedly eloped with a man who is ultimately found dead in the same park. When she is charged, Perry has to dig deep to find the truth.