Private Investigator Houston Mars has problems of his own--he was rejected from Chicago P.D., it's tough to make rent in the Depression, and he's still getting over the horrors he witnessed in the Great War. Add to that a lingering broken heart from the man who left his life four years ago to chase a Hollywood dream, and it's already shaping up to be a long December.In walks the wife of Charles Winsome, the youngest son of a wealthy steel magnate, asking Houston to find her husband. When she reveals that Charles lives a double life as a gay man, Houston knows the police won't take the case seriously, and he can't afford to pass.His opium-addicted partner Salvatore Costanzo is reluctant to work a case so close to home, but Houston plunges them into the world he left behind to find out what happened to Charles Winsome before his family puts a stop to the investigation--and to justice.