Chief mermaid actress Meng Xiran suffered a sudden accident during an exclusive confined cabin performance, which not only caused her to choke on water and suffer from lung disease, but also resulted in her being bitten and disfigured by fish schools. The aquarium's reputation plummeted as a result, and her relationship with her father completely broke down. Stepmother Lin Manyun seized the opportunity to replace her and firmly secured the chief position. With the National Day performance approaching, her father prepared a duet show to regain popularity, and Lin Manyun finalized a partnership performance with Jiang Chen. On the eve of the performance, Meng Xiran accidentally stumbled upon Lin Manyun's affair, learning that the accident a year ago was her deliberate murder. Enduring and setting up a scheme, she resolved to let the two expose their evil deeds and pay the price under the gaze of everyone.