As the super snow-moon storm peaks, the Cornelia Marie's deck becomes a gauntlet for Josh and Casey's greenest greenhorn. Ice fog overtakes the fleet as Monte scrambles to stay afloat, Harley loses an engine and Junior fights a sea-flea infestation.

Saga loses a veteran deckhand, forcing Jake to steam a greenhorn army to the Russian line. Amid scuttlebutt that ports are closing due to a virus, Josh fights to get home for a reunion with his brother and Sig's daughter gets rushed to the hospital.