Somi is a runaway mermaid living on land for fifteen years. She transforms into a mermaid when she touches the water. She meets with Jihoon when her human cousin, Sungwoon, brings s to her luxurious bungalow. Jihoon secretly develop feelings and one day he discovers Somi's real identity. Dae-hyun wants to use her for his personal vision and Daniel slowly likes Somi as well. Between WANNA ONE members and Dae-hyun, who will win Somi's heart?

  I was a little seven year old when I got dragged into their world. I've always done what I was told to do; never in my life have I questioned my job or my boss. but now, a decade later, I'm starting to see things differently. Ever since I met them, they've shined a different light into my life, and my heart started to wa