A new boat, the Chris Andra, sails on her maiden voyage, but the crew has difficulty catching migrating mackerel; and the skipper of the Renown attempts an archaic form of fishing, and takes another risk when he takes the boat in waters littered with wrecks.
A skipper with one of the smallest boats in the fleet must decide whether to weather a storm or head back to the harbor; and two trawlers fish together, requiring that the crews work as one team and trust each other.
A trawler is caught in a storm. Adding to the gravity of the situation, the nets get caught on the seabed, and the first mate tries to free them; and another trawler fishes for prawns near a dangerous underwater ravine.
The Amity is at Devil's Hole and the engines are failing, which might require that the nets be cut and the crew will return without fish. Meanwhile, the teen recruit in a nearby boat tries to prove himself to the skipper.
A 17-year-old recruit goes on his first trip on a trawler in search of haddock and cod, and he must impress the skipper or go home after the journey. Meanwhile, a boat heads into the treacherous Devil's Hole in the North Sea.
A boat heads north, close to the dangerous waters near the Arctic Circle, where the men endure a week without a decent catch until their luck turns. Meanwhile, the crew on another boat worry that they may not get a good price for their catch at the market.
Two boats are out in a winter storm and the captains must decide whether to ride it out or go home and lose vital fishing time, while a boat in calm waters and in search of haddock only catches unwanted fish.