Zhao Fan was once an overworked wage earner in a big city. However, after accidentally saving someone's life, he became bound to an Ocean Contract System. With just enough points, he can form contracts with sea fish and make them obediently follow his commands. Zhao Fan then quits his job and returns to his fishing village. Starting with small fish and eventually forming a contract with the ocean's overlord, the killer whale, he embarks on an extraordinary journey from ordinary fisherman to success. Along the way, he brings his entire family into a wonderful new life. Season 4.