A witness fingers the gangster who cut a rival in half with a shotgun blast, but the killer's alibied by a beautiful actress. The thesp is beloved in ChiTown and has a sterling rep that'll guarantee acquittal. Lt. Ballinger must discredit her story and find out why Tammy's lying for smarmy hood Sandy, who now controls the Loop liquor racket.

Ballinger is working a jewelry theft when he becomes convinced one of thieves is a clean skin amateur. He realizes by putting pressure on this individual he has a chance to crack the entire racket open.