John Dutton has survived all threats and still defends Yellowstone Ranch. With Monica gone, Kayce raises his 13‑year‑old son Tate alone. Y/N returns home as both a skilled rancher and a highly decorated U.S. Marshal — director of Shadow Team, an elite unit that hunts cartels, exposes corruption, and tracks serial killers. After Y/N saves Tate from a dangerous wild stallion, a deep bond forms between Y/N, Kayce, and Rip. They build a committed polyamorous relationship, marry, and grow their family while raising Tate. As Y/N’s investigations reveal the same criminal forces are trying to seize Yellowstone, the three must fight side by side — protecting their land, their legacy, and the family they’ve chosen, while bringing justice to those who threaten everything they love.