A wealthy woman hires Mason to buy stock in her husband's land company, hoping to force his mistress out. But her plan goes awry when she is charged with murder.
Perry defends his client by invoking the constitutional provision of double jeopardy.
Jo Ann Blanchard seeks the help of Perry Mason when John Brant, a wealthy and crippled old man, takes her prize race horse as payment for a mortgage he holds on her property.
Perry Mason is hired by a distressed girl who assumed the identity of a non-existent cousin to report her own disappearance as a suspected suicide.
Perry becomes involved in a murder charge when a private investigator deals in blackmail.
