Tells the romance story of a girl named Hye Ri. She goes to Gangwon Province on a graduation trip with her friends. There she meets a mysterious man Woo Hyuk who runs a guest house. She gets attracted and closer to him and decides to name him “the mermaid prince”.

“The Mermaid Prince: The Beginning” will take viewers back in time to Woo Hyuk’s high school days in order to uncover a secret. As opposed to the mysterious, dreamy Woo Hyuk that viewers saw in the original “The Mermaid Prince”, Moonbin will be playing a far more mischievous teenage version of the character in the upcoming prequel. With its high school setting, the drama will also portray an entirely different kind of romance from that of the original series. “The Mermaid Prince: The Beginning” will tell the love story that ensues when Jo Ara, a high school student who decides to give up on dating because she doesn’t believe in love, ends up meeting Woo Hyuk. Yoon Gun is a guy that looks cold on the outside but is actually a romantic at heart and only has eyes for one person.