The regional natural reserve of the Saisies Beaufortain Val d´Arly protects the largest mountain marsh known in the Alps. Over the course of a year, we follow its human guardians, visitors and its non-human beings residents. All their stories are interdependent : human beings, mountain owls, badgers and dragonflies living side by side without realising it. Our camera tries to understand symbiosis from a non-human point of view telling the stories of all these species.