Marlowe (Dick Powell) is a loner private detective. One day, Marit (Douglas Walton) finds Marlow to hire him as his bodyguard, but Marlowe is inexplicably punished. A beat. Later, a girl named Ann (Anne Shirley Anne Shirley) appeared, and she told Marlowe that everything he had encountered was inextricably linked to her stepmother, Mrs. Greer, and the emeralds she owned. Marlowe, who is deeply curious about Emerald, decides to investigate this chain of events.
With the help of Ann, Marlow gradually got to know the whole picture of the incident, and hidden behind it is Ann's father (Miles Mander). Not only that, but not long ago, Marlowe was hired to find the whereabouts of a woman named Verma, who was also implicated in Jade's case.
