A child is missing and a desperate mother hires private eye Joshua Oates to find her. "The Killer's Code" sends the detective back to Los Angeles, California, where he confronts his past. His new client turns out to be his ex-wife, whose daughter is missing, a child that could be his own! It is late fall of 1920 and Joshua Oates's past catches up to him. The ex-police captain, who left the west coast city in disgrace ten years ago, must ask his old precinct for help. While his relationship with NYPD police detective Angela Lang may be over as well. The hard drinking private eye faces old and new enemies out to stop him. With help from old friends Wyatt Earp and Harry Houdini, now in the Hollywood motion picture business, Oates uncovers police corruption and discovers an ambitious real estate buying scheme connected to murders in Los Angeles county. Without his knowledge, Angela Lang travels to LA to help investigate and to settle their on again, off again relationship once and for all.