Lin Yan, a modern-day Arctic expedition team member, unexpectedly travels through time into the body of the Lin family's legitimate eldest son, who has been exiled to Jiyuan Island and is on the verge of freezing to death. Facing a desperate situation, he relies on his polar survival knowledge to break through the ice and stay alive. By making his own crab traps, he catches a giant king crab, securing the family's first bowl of hot soup and saving them from the brink of death. As internal family conflicts and outside enemies arrive one after another, he brings every opposing force under his command, transforming this frozen sea into an impregnable northern commercial empire.