Félix Rodríguez de la Fuente and his crew navigate the Orinoco, where they encounter the Yanomami. A people of the Venezuelan jungle who, despite having no knowledge of mathematical laws, build perfect bridges based on their thorough understanding of every type of wood in the jungle. A people of the forest who avoided the great rivers because, according to their traditions, that was where the great dangers lay. An adventure on the banks of the Orinoco River.