Parker and his friends relive the toughest journey of their lives. They reveal the struggle, conflict and secrets about how close they came to disaster.

With 375 miles to go, their journey takes an unexpected turn when Parker falls into freezing water and jeopardizes the entire expedition.

Parker and his crew are only 50 miles into the daunting 600 mile trek on the Klondike Trail. It's a race against time as the water is quickly freezing, but with food sources running low they are forced to pause and go hunting or face starvation.

Parker Schnabel and his friends pay tribute to the legends before them and attempt the Klondike Trail of 1897. Not only is it 600 miles of mountains, lakes and rivers, but leaving dangerously late in the season means the winter may derail their plans.