In Ouganda, in an island of equatorial forest surrounded by a road, live an endangered wild community of chimpanzees. Following their tracks in the closer, a researcher in primatology, Sabrina Krief, tries to understand them better to protect them better, and observes their consumption of medicinal plants which could well heal us. Immersed in the research team from the dawn at day fall, the poetry of the forest is imperative, fragile and threatened, as our two species.