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.

Walker continues to try to reconnect with his family but finds that his kids have developed new routines with Liam. Back at work, Captain James tells Walker he needs to get recertified to be a Ranger, but old memories of Emily hinder his progress. Micki investigates a suspicious fire.

Walker’s life gets more complicated when his childhood best friend, Hoyt Rawlins, returns to town. Abeline is thrilled to have Hoyt home but Geri has conflicted feelings for her ex-boyfriend. Meanwhile, Micki has her suspicions about the real reason Hoyt returned to town.

When Geri decides to sell the bar, it throws Walker for a loop. With so many memories attached to the bar, he asks Geri to reconsider and reminds her of all the good times they’ve had there with Emily and Hoyt . Meanwhile, Micki is shocked when her mother drops in unexpectedly.

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. Bonham and Abeline stop at a store for supplies where old memories resurface. Meanwhile, Liam and Bret get trapped in an elevator.

Walker and Captain James investigate a high stakes poker game where one of the players may have information on Emily’s killer. The night takes a turn when Geri shows up to join the game. Meanwhile, Micki takes August and Stella on an unusual adventure.

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

Things are still tense between Walker and Liam after Liam called in a false warrant on Dan Miller. However, things take a turn for the worse when Captain James informs the brothers that Serano’s lawyers are using Liam’s mistake as a way to set the criminal free, putting the entire Walker family in danger.

It’s graduation day and the Walker family is turning a corner into a seemingly hopeful future that is until Cordell goes missing, and his mysterious captors are trying to break him down physically and mentally. Meanwhile, Captain James, Cassie and the rest of the Rangers have all hands on deck to bring Cordell home safely but Stella has ideas of her own on how she can help.

Stakes are high as Cordell, Cassie, Captain James and Trey all realize Grey Flag's plans and partnerships extend deeper than they once thought. While the Walkers plan for the Mayor's Medal Ceremony, Cordell struggles with missing out on time with his kids as he focuses on trying to keep the whole city safe.