Shares the untold story of York, the Black explorer who played a pivotal role in the Lewis and Clark Expedition of 1803-1806. The film follows eight adventurers on a four-day river journey along the Upper Missouri River Breaks National Monument in Montana, a rugged and beautiful landscape traversed by the Corps of Discovery in the early 19th Century. Set against the breathtaking landscapes that York helped to chart, the film combines live interpretive storytelling with candid discussions on the enduring legacy of an enslaved man struggling against the glaring contradictions of environmental justice in a new nation predicated on the idea of personal liberty and freedom.