As winter weather unleashes havoc on the crab grounds, the deadliest harbor in the Bering Sea becomes the only port open for delivery, forcing the crab fleet to make high risk entries into a harbor that has claimed the lives of many fellow fisherman.

The Cornelia Marie crashes into the ice pack when the greenhorn on watch falls asleep at the wheel. Jake's crew experiences a stunning phenomenon when a flock of seabirds bombards the Saga. Wild Bill tackles an unsafe sea state on the Summer Bay.