With millions of fans around the world, LAPD homicide Detective Harry Bosch finally comes to television. He is relentless. Even in the face of threats to himself and those he loves, he will stop at nothing to bring justice to victims. But behind his tireless momentum is a man who is haunted by his past and struggles to remain loyal to his personal code: “Everybody counts or nobody counts”.
 
Bosch chases a murderer after a dog brings home a human bone in the Hollywood Hills. Along the way, Bosch encounters departmental politics, media intrusion, a coroner more concerned with her reality TV ratings than the victims she autopsies, a young cop willing to do anything to become a hero, and a family destroyed by violence.
 
Bosch also finds himself in federal civil court, accused of wrongfully killing a suspected serial killer. The trial explores Bosch’s motivations, which are rooted in his childhood, as the plaintiff’s attorney attempts to use that which makes Bosch so relentless and turn it against him.