Cordell Walker returns home to Austin, Texas, after being undercover for two years, only to discover there's harder work to be done at home.

Micki is uncomfortable with the spotlight Capt. James puts on her during a current investigation. Walker talks to Liam about their parents and learns there was trouble while he was away. Trey applies for a new job in town.

With the Sidestep now in their name, Walker, Stella and August put their stamp on the place. Liam turns to Bonham for advice on a career move, while Micki and Trey work through the aftermath of his injuries after the hurricane. Stella confronts Clint about Trevor and his response prompts Stella to make a dangerous decision that will leave a permanent mark on the Walker family.

The show flashes back to the days right before and after Emily's death and how the entire Walker family dealt with the sudden tragic loss.

Walker takes Stella and August on a road trip to discuss some devastating news. Meanwhile, Captain James enlists the help of Micki and Trey to find a missing military veteran.

Captain James leads Micki and the team into a drug bust with a dirty cop, Officer Campbell at the center. However, after Campbell is inexplicably set free, the cop targets the Captain’s son, DJ , in retaliation. Walker gives Trey advice on his future.

Walker and Micki investigate a bomb threat at the school that targeted Liam and Stan. Abeline and Bonham plan a vow renewal, and Trey’s mother comes for a visit.

Walker’s world is shattered after receiving shocking news that changes everything.

While setting up protective detail on Trey, Captain James is shot and left in critical condition. Walker takes on the role of interim Captain and turns to an unlikely source for help.