Tide catcher Chen Yu was betrayed by his girlfriend Liu Manyun and Han Tianhu, the son of the village bully. After being pushed into the Ghost Reef waters, he drifted to a lonely island, rescued Yue Ji, the Mermaid Queen, and was gifted the Water-Avoiding Bead. From then on, entering the sea was as smooth as walking on flat ground, and deep-sea treasures were gathered in full. He returned to the village to expose the truth, became immensely wealthy thanks to the Water-Avoiding Bead, cleared out relatives, trampled petty people, fought the fishing bullies, investigated the truth of his parents' past, finally became the King of the Deep Sea, and found true love with Xu Yanyu.