In the 1980s, Wang Dahai from Wang Family Fishing Village was framed by his second uncle Wang Man, expelled from the genealogy, and all his assets were seized. He could only live in a dilapidated shack on the mudflat with his younger sister Xiao Ya. When driven to a dead end, he awakened the ability to control offshore marine life, barely making a living relying on seafood. Wang Man and his son constantly made things difficult, even making a fishing bet at sea and secretly plotting against his life. Wang Dahai relied on his superpower to resolve them one by one, and went to the dangerous Guitou Reef to find out the truth about his father being abandoned and killed by his second uncle back then. Finally, he cooperated with the police to expose the crimes of Wang Man's family. After the bad guys were arrested, Wang Dahai contracted the mudflat to open a seafood factory, married his sweetheart Xiuxiu, led the villagers to increase their income, and the family lived a good life.