The terrified blonde with the black eye who appeared in Perry Mason's office one morning had obviously left some place in a great hurry, for under her fur coat she wore only a thin dressing gown and she was fighting mad . She wanted mason to take action against her employer's stepson, a particularly obnoxious young man who had knocked her down when she resisted his advances. The story she told led Perry and his resourceful secretary, Della Street, straight into an investigation of queer doings at the home of Jason Bartsler Perry was sympathetic. he took action at once - and got $1,500. 00 for Diana and a $500. 00 fee for himself. Case dismissed. But the very next night, the girl who shared Diana's apartment was found murdered. At the scene of the crime, the police found two vital clues: the murder weapon, a pistol covered with Diana's fingerprints, and her bag containing a receipt for his services, signed "Perry Mason per Della Street". Two more blondes serve to confuse the plot still further and matters are not helped by a slight case of baby snatching. Now Perry mason really had a case!