The people of the Mashco Piro fled deep into the Peruvian Amazon to escape the cruelty of colonialist rubber companies. They cut all contact with the outside world and entered an isolation they haven't abandoned to this day. Carl Gierstorfee, the award-winning German filmmaker and biologist, turns around in front of the river and looks back at those who want to break the contact with the isolated people. While the story has elements of a thriller, it also reflects existential questions about the human condition. We have gained exclusive access to a unique project where a team of anthropologists have started a dialogue with the Mashco Piro, who keep appearing regularly at the opposite riverbank. It is an unprecedented experiment with the objective of finding out the motives of an isolated people; to warn them about the dangers that come with contact while still allowing them to chose their own path into a fragile future.