A worldwide drug poisoning incident caused Chi Lu, a treasure hunter, to accept a commission and disguise himself as a visiting scholar to come to Haiyan, which broke the peaceful life of the girl Dai Xi. As the mission progressed, the relationship between the two gradually heated up. However, the disappearance of Dai Xi's father, Professor Dai, the exposure of Chi Lu's identity, and the true formula of the mysterious drug gradually surfaced. One mystery after another troubled Dai Xi, and the changes in her body could not be ignored. In the process of searching for her father, Dai Xi gradually solved the mystery of her life experience. At the same time, the tragedy of the mermaid tribe that occurred in Shuigong Island 20 years ago was also revealed. The mermaid tears that the mermaid tribe had been looking for were actually in Chi Lu's body. Love or tribe, trust or suspicion, Dai Xi, as a mermaid princess, was completely in despair. The death of Cheng Hongwei, the real murderer behind the scenes, made Dai Xi and Chi Lu stand on the opposite side of their former best friends. When Dai Xi decided to take on the mission of the tribe, where would her love with Chi Lu go...