Susan Dorn

Two troubled women, Millie Crest and Fern Driscoll, switch identities. Millie, posing as Fern, stabs shady private eye Carl Davis in the arm in self-defense. Davis then turns up dead from poisoning of the stab wound to his arm. Millie then gets Perry to help her in return for a 38 cent retainer.

Perry defends a sweet old lady who was nurse to a wealthy woman. Apparently, when the woman died, arsenic was found in the milk she was given just before her death.

Lovely Kay Dalton, terrified of the sea, persists in skin-diving. Her objective is to recover a cache of stolen diamonds on the ocean floor. Although Mike Nelson warns that she will never conquer her fears, Kay refuses to quit.