The drama is a fantasy romance, taking its motif from the mermaid/merman story in Korea’s first historical (romance) storybook. In the Joseon-era storybook, it is recorded that real-life figure Kim Dam Nyeong returned mermaids/mermen that were caught fisherman back to the sea.
Elenco: Jun Ji-hyun , Lee Min-ho , Lee Hee-joon , Kal So-won , Shin Hye-sun , Lee Ji-hoon , Shin Eun-soo , Jr. , Jeon Jin-seo , Moon So-ri , Park Hae-soo , Hwang Shin-hye , Sung Dong-il , Na Young-hee , Choi Jeong-woo , Krystal Jung .