Walker, Cassie and Captain James team up to put Trey through the final stages of his training, a “Rangers hell-week” that will ensure he’s ready to join the ranks of the elite organization, but it’s not only Trey who is put to the test, Walker hasn’t worked with Cassie in weeks and both struggle to get their partnership back in sync.

Cordell is tipped off that Grey Flag may still have him as their prime target. Meanwhile, Captain James has discovered that Cordell and Cassie weren't truthful about some top-secret information and Trey's involvement in the prior week's case lands him in hot water. Abeline and Bonham disagree on how ready Cordell is to handle his responsibilities, while Liam continues to pursue his new business venture, despite his dad's displeasure over his son's new partner.

It’s a big day for the Texas Rangers and the Walker clan as friends and family gather to celebrate a very special event.

Walker, Trey, Cassie and Detective Luna explore more leads as Walker starts to become more and more invested. Captain James notices Cassie and Luna growing closer. Stella goes to Bonham for self-defense training and August excels in his boot camp training. Lastly, Bonham and Abby discuss the future with mixed opinions.