When stores and offices close and most people go home to sleep, an invisible army of nightshift janitors moves in to clean. Midnight Ballads plunges into the reality of five hard-working Latino immigrants living in Montreal. Mauser is new on the job after having recently escaped political persecution by Mexican police. By peering into their lives and hearing the impassioned stories of each of these workers, we discover a rarely seen Latino subculture and the people responsible for the dirtiest job in town.