The self-made tycoon Liu Xuan (played by Deng Chao) has acquired a new piece of land and teamed up with the strong woman Li Ruolan (played by Zhang Yuqi) to use terrifying sonar technology to drive away fish for land reclamation. The mermaid clan has lived in the sea nearby for a long time. In order to survive, the eldest brother Octopus Bugs (played by Luo Zhixiang)...