Expedition. Ben Stookesberry, Sarah McNair-Landry, and Erik Boomer are heading north. They want to cross Greenland's gigantic ice sheets with snow kites, followed by a kayaking first descent in a meltwater stream down the glacier. But Greenland is tough terrain—it’s a journey into a fragile yet dangerous paradise. During the snowkiting leg, Sarah must deal with a serious crash on the ice. Later, Boomer deliberately risks his skin on an enormous multilevel waterfall, and even Ben, the nard-nosed expedition expert, must ultimately concede that it can be officially too cold to kayak.