A small city located in the heart of the Amazon, Humaitá has one inhabitant per square kilometer. However, it has six bus companies. The most famous, the company “Siquiera”, is run by Luis and his son Leandro. They are the only ones who dare to venture onto Nacional 319, the most dangerous road in Brazil. If the other companies threw in the towel, both persist. After considerable effort, they decided to rehabilitate an abandoned road that runs deep into the Amazon rainforest.