This urban web drama is set as a fantasy love. The heroine Wang Zixin, played by Tang Min, is a rich daughter, but she has secret that causes her very low self-esteem. She suffers from ichthyosis and is tortured by this disease. Wang Zixin was deceived by her scumbag boyfriend, who put her in danger, and she accidentally falls into the sea. Fortunately, she is rescued by Yu Sheng. Yu Sheng is not an ordinary person, but an alien from the planet Kepler, and a legendary merman. As the king of the sea, Yu Sheng is simple and kind; does not know the world; & meets this human girl with peace of mind.