The Mountain Man is a documentary about Benjamin Harrison Hensley (Harrison), an old man who lives in the mountains of southwest Virginia. Harrison lives in a small cottage at the mouth of a valley. For his entire life, he has never had running water, a proper restroom, or a sense for cleanliness. Let alone, left his house. He's survived 3 heart attacks, triple bypass surgery, and overcome the loss of his wife due to a combination of not taking her shoes off for 7 years and a bad liver. The film tells the story of Harrison, from child birth to present day. Then, follows Harrison through a day in the life. Then... Having never seen anything more than his own small mountain community for over 82 years, production takes Harrison on a series of Adventures to let him see the world. We follow Harrison to see just how much he can take of the "21st century" and the people that have come to make up what we call society.