Mathieu Collette, a passionate blacksmith, renovates an abandoned heritage building belonging to the City of Montreal to create a blacksmithing school. Sixteen years later, after turning the building into an internationally renowned center for the transmission of living heritage, Mathieu is threatened with eviction for obscure administrative reasons, in the very year of Montreal's 375th anniversary. What could possibly justify putting one of Quebec's last blacksmiths out on the street, as the bearer of an unparalleled social and heritage project? Filmed over several years, this documentary traces Forges de Montréal's fight against the disappearance of a part of our collective memory.