From The Perry Mason TV Show Book
Perry accepts a thirty-eight-cent retainer from shapely Millie Crest, posing as Fern Driscoll, and played by the beautiful Ruta Lee. Unbeknownst to Perry, Millie has taken on this identity from the real Fern Driscoll (who is supposedly dead), to shield herself from a troubled past.
As Fern Driscoll, she runs into even bigger trouble when she stabs a man in self-defense, and goes on trial for murder. When Carl Davis turns up dead, from poisoning of a stab wound to his arm, a friendly witness points to Millie, now Fern.