In the wake of his most difficult season ever, Captain Sig Hansen attempts to build a new fishing operation in Norway, where King Crab are invasive. When daughter and co-captain Mandy Hansen joins as partner, she begins taking matters into her own hands.

Sig and Mandy go all in on a big change in strategy; when Captain Jake pulls up a king crab jackpot, he must choose whether to honor Sig's orders or go out on his own with millions on the line.

Sig and Mandy roll the dice on convincing old-world seafood barons to buy into an unfamiliar crab species but when Jake chases Russian kings far to the North, the Hansens must add a new boat to their Norwegian fleet for a chance at tanking the biomass.

Sig searches for secrets from a fishing legend; when Jake locates relatives, he puts together pieces of his family's past and finds unexpected answers about his own late father; Clark must prove can tank the crab on his own.

After guaranteeing a troll crab delivery backed by king crab, Sig must make good on his deal before the clock runs out. Jake makes peace with his late father's passing while Mandy finds she has an eye for traditional Norwegian cuisine.

Sig makes an ambitious deal for 25 tons of live king crab; Mandy hits the docks to buy a new boat; Sig and Jake scramble to the Russian line to find the migrating hoard; When Jake gets a line in his own prop, he must find a diver to save his shaft.

Sig and Jake steam far to the north to fill their tanks with Russian kings; Mandy captains a new boat with the technology to get him on the crabs.

Fishing for Kings, Sig discovers a surprise in his gear. Seeing opportunity, he entrusts the 193-foot Stalbas to Jake while he and Mandy pursue a market for a new species of crab. But as Jake's fortunes turn for the better, he starts making his own deals.