The arrival of the mining company Osisko creates a lot of excitement in Malartic, a small community of 3600 souls in Quebec, Canada. Faced with the implacable Mining Act, which prioritizes the right to exploit subsoil resources rather than the right to property, many families and seniors need to write off certain elements of their heritage plus a part of their lifestyle to make room for the largest open-pit gold mine in Canada. The characters in L'or des autres experience in their own way this major change that will affect their lives and urban environment.