Cornelia Marie skippers Josh and Casey follow a blind tip from an unknown fisherman into uncharted waters. Johnathan fears for the worst when Freddy lands in the icy Bering Sea. On the Wizard, Captain Keith tempts fate, risking thousands in crab gear right at the ice edge.

When processors shut down due to outbreaks, Sig bets he can zero in on a rare "crab highway" before there's no place to deliver. Josh and Casey race to deliver live crab after their pump fails, while Harley risks shipwreck to be first to enter St. Paul.