The epicenter of the film is the Notre-Dame district in Rouyn-Noranda, which is in the spotlight thanks to a series of revelations that shed light on the impacts of toxic emissions from the Fonderie Horne. It gives the opportunity to the Abitibi deputy Émilise Lessard-Therrien and the artist Richard Desjardins, originally from the Notre-Dame district, as well as several citizens to speak.