Small town guy John Nolan pursues his dream of being a police officer after a life-altering incident. As the force's oldest rookie he's met with skepticism from some higher-ups who see him as a walking mid-life crisis.
Talia forces Nolan to confront his personal moral inclinations after he encounters a kidnapping victim; Lucy is temporarily placed with a new training officer who tests her patience; and Jackson confronts his short-comings.
After Nolan and Talia lose control of a crime scene, they begin to debate whether people are fundamentally good or bad and what that means for a police officer.