故事以神仙與妖怪並存的世界為背景，講述東海鮫人世子長意（任嘉倫飾）在海上救了遭遇危險的順德仙姬（郭曉婷飾），生性單純善良的長意將其送回時，卻反遭暗算將其送到萬花谷殘忍囚禁。萬花谷護法兼御靈師紀雲禾（迪麗熱巴 飾）從小被谷主控制，為了自由決定放手一博，爭取馴服長意的機會，在馴服過程中長意漸漸融化了紀雲禾的心。二人經歷了陰謀、誤會、相遇及離別後，一仙一妖跨越種族的愛戀，衝破束縛、歷經千難萬險終成眷屬，攜手拯救蒼生的故事。

In a world populated by powerful gods and warring mortals, two enchanted beings meet in a peace-filled realm: They are Su Mo, a prince of sea gods, and Bai Ying, a princess and descendant of a mighty sword deity. They are immediately attracted to one another and begin on a romance, unaware that they are effectively crossing enemy lines and sparking animosity between two warring factions. Their actions anger other deities and Su Mo is eventually expelled from the realm. Overcome with grief, Bai Ying attempts to put her existence to an end by jumping from a magnificent pagoda.

Tatsumi is a high school student who lives on his own, until a merman named Wakasa takes up residence in his bathtub. His solitary lifestyle is turned upside down by the self-centered (but handsome) new roommate.

Gu Ze Yi, the merman prince, was captured by the human woman Lu Miao Miao. Gu Ze Yi started a long journey of "chasing the beads." His three brothers made jokes in order to help the eldest brother retrieve them.