Over 900 years ago, Ao Fanfan, the princess of sunfish, was rescued by a young scholar Huo Yunshen. Therefore, she decided to marry him once Yunshen turned 25. Strangely, in each life of Huo Yunshen, he died before the age of 25. In this life, Ao Fanfan came ashore early. She found Huo Yunshen and had a joyful and pleasant amount of time with him. With the love growing between these lovers, the crisis was quietly approaching. In the end, Ao Fanfan used her life to protect Huo Yunshen and the sunfish tribe in the underwater world. Waiting for her rebirth and meeting Huo Yunshen by the seashore again.