François Sim, a man who feels worthless, struggles to connect with his daughter Lucy and has lost his job and wife Caroline. He missed out on passion in his youth and has been a bore to others. Despite this, he takes a new job driving across France to sell a revolutionary biological toothbrush to reluctant dentists, hoping to find meaning in his life.

The Very Private Life of Mister Sim
A man's life unravels after job loss and marital separation, forcing him to confront a long-held regret that refuses to let him move forward.