Private detective Xu Siwei received a mysterious case to find a missing father. During the investigation, he accidentally stepped into a parallel world, and encountered a monster from another dimension. After escaping, strange things keep happening to him. In order to resolve the problem, he decided to get to the bottom of things. However, a huge scientific conspiracy is quietly coming Xu Siwei’s way......

Since ancient times, it is said that humans and demons cannot be with each other. When the dragon demon girl, Bai Xi, first traveled to the human world, she accidentally met Hong Ji, a temple handyman. Through a series of coincidences they went to the capital together to look for the lost sister of the white dragon, the black dragon girl. A fantastical and poignant love story has been unfolding since then.........