Sig makes a desperate bid to save his gear from the descending ice pack while Jake dumps pots to avoid capsize. When Wild Bill gets a line caught in his propeller far from Dutch Harbor, he enlists Jake's diver to attempt a risky underwater repair.

Skirting the ice line to the deepest set of their careers, Josh and Casey apply frontier medicine to a bleeding deck boss. A block wound sidelines Wild Bill's new rail man, while injuries on the Time Bandit take out two crewmen and threaten family bonds.