Zhao Fan was originally just an overworked laborer in a big city. But after saving someone in an unexpected accident, he becomes bound to the Ocean Contract System. As long as he has enough points, he can form contracts with sea fish and make them obey his every command. So Zhao Fan quits his job and returns to his fishing village. From contracting small fish at the start to forming a contract with the ocean's overlord, the killer whale, he embarks on a one-of-a-kind journey of an ordinary fisherman rising to success. He will lead his family to live a wonderful life.