The short Yukon gold mining season is almost over, and crews are battling the elements in a mad push for gold. Ken is forced to call in reinforcements when winter hits Moose Creek hard. Cam hits an impenetrable ice wall that freezes him out of his cut and moves to risky new ground only to have crucial iron go down. Big Al’s plans to rip through promising dirt are sidelined when his only stripping dozer suffers a catastrophic breakdown that puts right-hand man Hiro’s mechanical skills to the ultimate test.