The Pamban Railway runs through Tamil Nadu, the former Madras, carrying trains across roughly 600 kilometers of tropical coastline before reaching the Pamban Bridge, the first railway bridge built across the Indian Ocean. The film rides the Rameswaram Express over the crossing, using onboard and aerial footage to show how the line's engineers dealt with cyclones, monsoon rain, and corrosive sea air when the bridge was first constructed and how Indian Railways keeps it running today. Maintenance crews, engineers, and railway staff appear on camera describing the manual checks and repairs the structure still requires, and the film lingers on the bridge's swinging span, once opened by hand to let ships pass. Archival material sits alongside present-day footage of the track bed, the fishing town of Rameswaram at one end, and the storms that have periodically damaged or destroyed the line since it opened. It is one entry in a series profiling railways built through geography that should have made them impossible.