*Jungwon is the son of the richest billionaire and very rich young master, his whole family are prominent people, he is handsome, smart, rich and have big company too but one weakness, he can't swim because of his past trauma, Since childhood, he has often been with his rich grandmother.

Jungwon was on holiday in the middle of the ocean on his grandmother's large, luxurious yacht, but who would have thought that at that time he fell without anyone knowing, he drowned and his past trauma haunts him, he sank deeper and deeper, he began to despair and said in his heart, "god.. not now.. help me, If this is my death, I will surrender everything to God." he looked around, only the blue sea.. but he saw something, a woman as beautiful as a goddess.. and he started to get confused and panic, it's a mermaid!!?