Left out in the cold by his crew, Chris McCully risks an unprecedented winter solo dive without a tender. The Kellys look to continue their new hot streak, but hypothermia becomes a serious threat for one diver when equipment begins to fall apart.

Shawn moves in on Vernon's spot on Claim 56 as the two miners chase the same paystreak, but only one will prevail. Zeke gambles with a move across the ice. Chris McCully hopes his failing pump engine will last. Kris Kelly faces a life-or-death situation.