Greg's father, Brent, and his good friend, Ryan, head out on snow machines for an iconic and challenging northern hunt: For wood bison. Some of the winter's coldest temperatures greet the team as they struggle to stay warm and safe through a bone-chilling deep freeze. If you've ever seen a bison hunt, you know that the challenges are immense. With two shooters looking to take two bulls out on this one, what could go wrong?