Diving expert Xu Lang is exploited by his relative Zhao Jinhai. Despite risking his life at sea, he only gets a 50,000 bonus, pushing him to break off all relations completely. He sells all his savings to buy a scrapped speedboat. With his ancestral sea-reading skills and professional fishing techniques, he settles down at the abandoned East Port with his partners. Facing full suppression and blockade from the Zhao family’s dock, Xu Lang builds his reputation with top-tier catches and makes up for his shortcomings with data-driven methods. In a ten-day Fish King wager battle, he dominates with rare large yellow croakers, crushes capital monopoly, rewrites the harbor’s rules, upholds a fisherman’s original heart, and inherits the ancient sea-watching craft.
