When a rafter goes overboard, a legendary jetboat captain springs into action to save the man before the river's rapids claim another victim. Heavy rains threaten to destroy Aubrey's ranch. She calls in air support to help save her barn.
A predatory bear stalks a homestead forcing the rancher to aggressively protect himself and his cattle. A jetboat engine failure in the river rapids puts Buck's operation in jeopardy. A violent storm forces bush pilots to make an emergency landing.
As the winter ice thaws, Idaho's River of No Return flows, and the people living on its violent shores navigate the raging spring rapids. The small community hustles to work, so they can survive another season in this rugged and dangerous backcountry.