Jiang Hai, who failed his wife and daughter and wasted his life in his past life, is reborn at the critical moment when his wife and daughter are in danger. After rushing to save them, he accidentally obtains the inheritance of the ancient Dragon God. From then on, Jiang Hai gains the divine power to communicate with and command all living creatures of the sea. He turns over a new leaf; starting from catching fish with his bare hands to pay off debts, he gradually deals with greedy relatives, buys iron ships, builds a grand mansion, and leads his wife and daughter to a good life — rising from a good-for-nothing in everyone's eyes to the Sea King of the Era and a business tycoon.