When Kayce and Andrea's off-hours fugitive hunt unexpectedly reveals the whereabouts of a notorious bomber who previously slipped through Cal's fingers, the team is pulled into a dangerous pursuit that threatens to open old wounds. Meanwhile, threats against Belle move frighteningly close to home, and Miles finds himself hiding crucial information from Maddie about Cal's cancer.
With the Yellowstone Ranch behind him, Kayce Dutton joins an elite unit of U.S. Marshals, combining his skills as a cowboy and Navy SEAL to bring range justice to Montana, where he and his teammates must balance family, duty and the high psychological cost that comes with serving as the last line of defense in the region's war on violence.