Lin Haifeng unexpectedly wins five million yuan in the lottery and plans to celebrate with his wife, Su Mei. However, he discovers that she has been secretly having an affair with his brother, Zhao Qiang. Under the pretext of going scuba diving for fun, the two lock Lin Haifeng inside a shark-proof cage and sink it to the bottom of the sea, intending to steal his winnings. At the critical moment, Ao Xue, the Dragon Girl of the Eastern Sea whom Lin Haifeng once rescued, arrives to repay his kindness and grants him the power of the Dragon God, allowing him to command all sea creatures. Having miraculously survived, Lin Haifeng uses his divine power to catch premium seafood and build his fortune while plotting his revenge. He publicly exposes Zhao Qiang and Su Mei's deceit, shatters their dreams of getting rich, and uses rare treasures to secure the rights to the Golden Bay waters, launching his own seafood business.