Stunt double—Yu Bei—fell into a merman’s territory by accident. To stay out of trouble, she disguised herself as a princess. The merman prince, who had not seen humankind for a long time, suggested a marriage of state just so he could meet the human emperor and save his kind from exploitation. He then visited earth with Yu Bei but later fell into a trap that Yu Bei set up for him... Official Translations: [Korean](https://page.kakao.com/content/60742533) [Japanese](https://piccoma.com/web/product/141047)