To help Francis Hallé in his fight to save the last tropical forests, a documentary filmmaker with a passion for nature decides to make his first film: "The Botanist", an ecological thriller with Leonardo DiCaprio. He traces his path with malice, obstinacy, and discovers, with candor, the arcana of the seventh art. Even if he never gives up, will his film ever exist?

In each episode, an exotic part of the world, of various extent, either on land and/or in the sea, defined by natural geography or human population, is presented. Native wildlife, natural conditions and their interaction with local people are examined.

Nicolas Hulot and the Ushuaïa Nature team set out to meet the people of the Mekong, from the province of Kamouane in Laos to the lost city of Angkor, the Khmer Versailles in Cambodia. The unconquered waters of the Mekong, a mythical river, 4200 km long, have conditioned the flourishing of the most intriguing civilizations of Southeast Asia. This incredible journey in the Indochinese peninsula is an opportunity to recall that all life in the hands of nature ...