A Bishop from Australia comes to Perry to ask him to take a case of a woman wrongly accused of manslaughter 22 years before. The case would involve the wealthy Mr. Brownley and the fact that his alleged granddaughter may be an imposter. With that, the Bishop leaves and is clubbed in his hotel room. Soon after, he leaves on a boat and Perry meets the woman - Ida Gilbert. Perry goes to see Mr. Brownley, but gets nowhere. Later that night, Brownley is to meet Ida, but he is shot by a woman who drops Ida's gun. Ida is arrested for the murder of Mr. Brownley and Perry gets involved.

After giving the District Attorney another stinging defeat, Perry plans to take a vacation in China. That is, he was, until Rhoda, his old flame, meets him at a restaurant. It seems that her husband Moxley, who had been allegedly dead for four years, is alive and demanding money as she has married into wealth. The case escalates when the police find the body of Moxley and charge her with the murder.

A very nervous man named Cartwright comes into Perry's office to have the neighbor arrested for his howling dog. He states that the howling is a sign that there is a death in the neighborhood. He also wants a will written giving his estate to the lady living at the neighbors house. It is all very mysterious and by the next day, his will is changed and Cartwright is missing, as is the lady of the house next door. Perry has a will and a retainer and must find out whether he has a client or a beneficiary.

Lawyer Perry Mason is summoned to the Laxter mansion in the dead of night to write granddaughter Wilma out of invalid Peter Laxter's will, to keep her from marrying suspected fortune hunter Doug. Peter dies in a mysterious fire and Laxter's two grandsons, Sam Laxter and Frank Oafley, inherit his estate on the condition old caretaker Schuster and his cat Clinker are kept on. When cat-hating Sam threatens Clinker, Perry steps in and learns Laxter's death was suspicious and the family fortune and diamonds are missing. Schuster's found dead in his basement apartment, Laxter's nurse Louise is murdered with Schuster's crutch, and circumstantial evidence brings Doug to trial for Louise's death. Mason's investigation produces a surprise witness who turns the trial around. Written by Sister Grimm