After years of investigation, Assistant District Attorney Martin Ferguson has managed to build a solid case against an elusive gangster whose top lieutenant is about to testify.

Mrs. Elizabeth Bright Murdock hires Marlowe to find an old rare coin, the Brasher Doubloon, that belonged in her deceased husband's collection. Marlowe begins investigating, but quickly finds himself entangled in a series of unexplained murders.

A prize-fighting boxer with a lethal right punch falls for a gangster's moll on the run in Mexico.

Jim Slater's father (whom he never knew) died in the Apache ambush at Gila Valley, and Jim is searching for the one survivor, who supposedly went for help but disappeared with a lot of gold. In the process, he gets several people gunning for him, and he keeps meeting liberated woman Karyl Orton, who may be on a similar mission. Renewed Apache hostilities and an impending range war provide complications.