The Trans-Andean railway climbs from the coastal city of Guayaquil into the highlands, covering 450 kilometers of narrow-gauge track first completed in 1908. The film follows the route through the Avenue of Volcanoes, past Cotopaxi National Park, up to Urbina, Ecuador's highest station at 3,609 meters, and on to Quito, the world's highest capital. Its centerpiece is the Devil's Nose, a near-vertical mountain face where the train zigzags up 500 meters of elevation in just 12 kilometers of track, engineered so switchbacks appear to overlap on the cliffside. Cameras ride the Tren Crucero, the restored steam train that carries up to 54 passengers through the Chanchán River gorge, while motorcycle guards close unguarded crossings ahead of it to keep the line clear. Damage from the 1990s and a 2013 restoration get their own mention as the film traces how the railway, once left for dead, became a tourist route again. Wide shots of Andean peaks and river canyons carry most of the runtime, with narration filling in the engineering and history.