
Starting over isn't easy, especially for small-town guy John Nolan, who, after a life-altering incident, is pursuing his dream of becoming an LAPD officer. As the force's oldest rookie, he's met with skepticism from some higher-ups who see him as just a walking midlife crisis. If he can't keep up with the young cops and the criminals, he'll be risking lives -- including his own -- but if he can use his life experience, determination and sense of humor to give him an edge, he may just become successful in this new chapter of his life.

It's Valentine's Day, and Lt. Grey gives Tim and Lucy an unromantic assignment; John and Celina track down a missing girl; the team sharpens up for a charity gala where multiple relationships come to a head.

The team searches for a serial killer; Nyla struggles with the aftermath following the attack; Lucy's relationship with Seth takes a turn; Bailey battles her fear of Jason Wyler.

Ahead of Bailey's return home, John looks for clues to locate Jason Wyler; Tim and Lucy swap rookies; a friendly face resurfaces at the station; Wesley feels unsettled over Angela.

The team is tasked with community policing while hunting for a local vigilante; Celina's instincts are tested; Tim and Lucy discover secrets about the two new rookies.