At 24, Zack looks like a young man who feels good about himself. His secret is well kept. A talented carpenter, he built cabins perched in the trees with his father. But his passion is boxing, which he teaches on a voluntary basis. Zack plans to move in with Marjorie when his father takes a bad fall and falls into a coma. He must face, alone, the head of the small family business. The shortcomings he thought he had overcome resurface, and as a newcomer, Inès, enters his life, his secret risks being revealed at any moment: Zack is illiterate.