Starting over isnt easy, especially for small-town guyJohn Nolanwho, after a life-altering incident, is pursuing his dream of being a police officer. As the forces oldest rookie, hes met with skepticism from some higher-ups who see him as just a walking midlife crisis. Throw in a workplace romance, a hostage situation, and some tough love from their new training officers, and the latest Los Angeles police rookie class has an uphill battle ahead of them.