Part One: Sister-Hood; A mob hit man, Brick Arcade, arranges to be interviewed by Sentinel reporter P. Easton Binney because he has a contract to kill the journalist, but the Hornet and his man intervene, resulting in "Mr. Death"'s arrest; Meanwhile, Diana returns home from the latest in a string of very unsatisfactory social encounters to find a costumed woman, who seems to refer to herself as Sister-hood, going through the D.A.'s jewelry box; An attempt to stop the thief gets Diana the worst of it, but she manages to call Paul before she passes out; Since the secrets of Reid Tower make a police investigation there out of the question, it's up to the Green Hornet.
