The story begins with the mermaid heroine Su Xiaoyu accidentally coming to human society from the deep sea. She is cute and innocent, and full of curiosity about the city. The male protagonist Lu Jingchen is the second generation of the rich. He is undergoing the test of his family and pretends to be a playboy and spendthrift to experience life. The two had constant conflicts when they first met, but gradually fell in love. However, Lu Jingchen is actually the villain in the family struggle, and his true identity and purpose lead to the unfolding of sadomasochism: Su Xiaoyu experienced betrayal, separation and heartbreak, but awakened from his cuteness and learned to be independent and fight. Lu Jingchen struggled between love and family responsibility, and finally cleared up and exposed the family conspiracy. The two overcame many difficulties and achieved an emotional counterattack. The plot emphasizes exciting points, such as the sweet reversal after being tortured, the heroine's growth and counterattack, the hero's redemption, etc. It maintains the color of an urban fairy tale and avoids science fiction elements.
