Having inherited the cases of her deceased mentor Paddy Reilly, private investigator Molly Murphy is following philandering husbands, tracking down runaway debutantes and working in a sweatshop to discover who is purloining dress designs. Then a woman's body is fished out of the East River and Molly fears it is the missing society girl everyone is talking about. Then Molly's sometimes beau, police captain Daniel Sullivan, reveals that another corpse may be the girl's cheating lover, Mike Kelly.