In 1983, in Xinghai Town, Binhai, Lin Hai is reborn with memories of his previous life and the supernatural ability to understand marine creatures. Facing years of exploitation by his elder brother and sister-in-law, as well as his parents' favoritism, he decisively splits from the family and leaves with nothing, armed with three years of household accounts. Using intelligence from marine creatures, he catches rare treasures such as large yellow croaker and black pearls, builds his fortune, and takes on the seafood tycoon who monopolizes the market. He pioneers a homemade cold-chain system to open up sales channels in the provincial capital, establishes a fishing cooperative, and leads the fishermen of the entire town to prosperity, writing a passionate legend of building a thriving business through the sea in the 1980s.