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?

• Francis Hallé
• Nicolas Hulot
• Antoine de Maximy
• Jacques Perrin
• Claude Lelouch
• Juliette Binoche
• Thierry Frémaux
• Édouard Baer