Inspired by a classic Joseon-era legend, the drama follows two parallel timelines:
Kim Dam-ryeong (Lee Min-ho), a nobleman and magistrate, saves a mermaid named Se-hwa (Jun Ji-hyun) from a greedy local official. Their tragic yet beautiful bond sets the stage for their future reunion. Inspired by a classic Joseon-era legend, the drama
Reincarnated as Heo Joon-jae, a genius con artist with a flair for hypnosis, Lee Min-ho encounters the mermaid again on the coast of Spain. Now named Shim Cheong, the mermaid follows him to Seoul, struggling to navigate the "human world" while trying to win his heart before her time on land runs out. Why Fans Love It Inspired by a classic Joseon-era legend