John is sworn in as governor of Montana, settles into the powers of his office and makes bold moves to protect the Yellowstone, and the bunkhouse and the Duttons enjoy the Governor's Ball.

Beth heads to Salt Lake City to take care of unfinished business, a trap's set for Jamie, Kayce makes an important decision for his family, and Thomas Rainwater deals with mounting pressure.

The Yellowstone enjoys an almost-perfect day branding cattle, Montana gets an unexpected visitor, Sarah sinks her teeth into Jamie, and Thomas Rainwater deals with a challenger from within.

John deals with a herd problem, Senator Perry delivers news to Thomas Rainwater, Jamie and Sarah plan their next move, and Beth discusses a new business plan with the ranch in mind.