A compilation of footage of steam trains in action, starting in the United States with a Frisco steam engine and a 21-car railfan excursion heading up Rolla Hill bound for St Louis. Catch steam engines working coal trail in Pennsylvania and then on to Wyoming to see the world's largest steam train, Union Pacific's Challenger, as it heads a 7000-ton freight up Archer Hill. In Cuba, Guatemala, and El Salvador, see Alco, Porter, and Baldwin locomotives working the sugar cane harvest. Observe steam operating in the Atacama Desert in Chile. In Paraguay see how North British-built steam veterans survive as wood-burning engines on a remarkable railway that remains 100% steam dependent to this day.