Writer Meng Xiaotang accidentally transformed into the female demon Feng Nanxi (Ke Ying) of the Moon Shadow Cult) was hunted by the whole world, thinking that by killing Ye Wuchen, the great disciple of Xiaoyao Sect according to the plot, he could return to reality.In order to find Ye Wuchen, Meng Xiaotang was forced to fight with the face-faced Shen Yu (Deng Chaoyuan).), the two seem to be in love with each other, but in fact they have their own agendas and battles of wits. After experiencing a series of turmoil in the world, they gradually fall in love with each other, and a sadomasochistic relationship begins.