Retiro Station in Buenos Aires anchors a network that moves hundreds of thousands of commuters every day, and this film goes behind the platforms to show how it stays running. Cameras follow dispatchers, maintenance crews, and ticket staff through their shifts, tracking trains as they fan out across the sprawling commuter lines that stitch together a metropolitan area of more than 15 million people. The film lingers on the station's history as one of Latin America's grand historic terminals, then contrasts that faded grandeur with the daily grind of keeping aging infrastructure functional under heavy passenger loads. Workers describe the mechanical failures, overcrowding, and scheduling pressures they deal with, while commuters offer glimpses of what the daily commute actually costs them in time and patience. The result is a portrait of a transit system operating at the edge of its capacity, told through the people who keep it moving from dawn until late at night rather than through statistics alone.