In the heat of summer, two security guards secure the river below the Faverges district in Lausanne, Switzerland. Ammar is new to the business, and Daniel shares his experience with him. Through rounds and encounters, a territory takes shape, a friendship is built. What could have happened near the river? Navigating between documentary and fiction, Tizian Büchi subtly questions the surveillance society through a contemporary fable imbued with mystery, nostalgia and humor.