Precision work at a height of 82 meters: While Daniel Coy and his metal construction colleagues erect suitable supports, Andreas Heller is positioning steel girders weighing several tons on the roof of a luxury residential tower opposite the Elbphilharmonie concert hall in Hamburg. The crane operator has to cope with the wind. At Augsburg Central Station, 100,000 liters of concrete are pumped into a formwork. And in the igloo village on the Zugspitze, improvisation skills are called for in this episode. That's because Jan Wernet and his team have misjudged the size of a bar made of ice blocks.