As Walker attempts to reconnect with his creative and thoughtful son August and his headstrong, somewhat rebellious teenaged daughter Stella, he finds that he needs to navigate clashes with his family.

Walker continues to try to reconnect with his family but finds that his kids have developed new routines with Liam. Old memories of Emily hinder Walker's progress of being recertified to be a Ranger. Micki investigates a suspicious fire.

Walker's life gets more complicated when his childhood best friend, Hoyt Rawlins, returns to town. Abeline is thrilled, but Geri has conflicted feelings, and Micki has her suspicions about the real reason he returned to town.

Micki is uncomfortable with the spotlight Captain James puts on her during a current investigation. Walker learns there was trouble while he was away. August stumbles upon some secrets from his father's time undercover.

When his past unexpectedly collides with his present life, Walker is forced to resume his undercover identity to keep his family safe. Micki gets caught up in Walker's old case. August threatens to blow his father's cover.

When Geri decides to sell the bar, it throws Walker for a loop and asks she reconsider and reminds her of all the good times they've had there with Emily and Hoyt. Micki is shocked when her mother drops in unexpectedly.

Captain James and Liam follow up on a tip regarding Emily's murder and head to Mexico for more answers. Trey escorts Stella, August and the girls soccer team to an away game but things takes a dangerous turn.

A tornado touches down in Austin and it's all hands on deck to keep the kids and community safe. Walker, Micki and Trey rush to the school where Stella, August and Ruby are at a school dance.

Walker and Captain James investigate a high stakes poker game where one of the players may have information on Emily's killer, but things takes a turn when Geri shows up

With the Sidestep now in their name, Walker, Stella and August put their stamp on the place. Stella confronts Clint about Trevor and his response prompts Stella to make a dangerous decision.

Walker and Geri are both unsure of their feelings for each other and things get very complicated when Hoyt comes home from prison, but the welcome home party is interrupted when Micki and Walker get word that Clint West is on the run.

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

Walker's past comes back with a vengeance and it threatens the very thing he loves the most - his family.

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

Micki's real mother, Mercedes, tries to make amends with but Micki doesn't want anything to do with her. Walker steps in to help and lands in a heap of trouble.

Captain James leads Micki and the team into a drug bust with a dirty cop at the center. However, after the cop is inexplicably set free, he targets the Captain's son 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. Trey's mother comes for a visit.

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