In the frozen wilderness that borders Alaska and the Yukon, a group of brave souls pursue an ancient and dangerous way of life. For these men, women and their families, winter trapping is not only a deep passion–it's their job. And they risk their lives to do it. In temperatures that reach 40 below—where skin freezes, snowmobiles break down, daylight fades fast, thin ice looms and predators are a constant threat—one wrong move can cost you everything.