From The Perry Mason TV Show Book
Dr. David Craig is in big trouble. Some of his tapes of conversations with his psychiatric patients are missing, and being used for blackmail. After a brief consultation with good friend Perry Mason, Craig decides to drop the issue. But Craig has been covering for Edith, his nurse and the woman he loves, while she in turn has been protecting her brother from the mob. When Edith's brother Mark is murdered, the good doctor is arrested for the crime.
Perry cases the scene of the crime in a new convertible. There follows one of his most explosive trials.