Thousands years ago, Shen Xi, the lord of the sea, was betrayed by the ancient tribes, and lost everything, including the Moonlight Gem, the holy relict of the Water Tribe. Holy Maiden Shi Yue went to the human world to find it. Here, she meets Lin Bai Yu, the director of the aquarium, and An Xu Guang, the heir of the Ann Group, who falls in love with Lin Bai Yu. From then on, a complex love triangle begins, which join forces to find the moonlight gem. (Source: Chinese = ent.china.com.cn || Translation/Edit = MyDramaList)