Jake scrambles to repair a slack tank before it kills his crab or capsizes the Saga. As an injury knocks Sig out, Mandy takes the helm to face a disgruntled Northwestern crew. Wild Bill and his crew face the full wrath of the bomb cyclone.
Saga loses a veteran, forcing Jake to steam a greenhorn army to the Russian line. Tensions rise with rumors of closing ports and a pandemic. Russian boats disappear, Josh fights to get home to see his brother and Sig's daughter is rushed to the hospital.