During the Yonghui period of the Tang Dynasty, the celestial phenomena are abnormal and the people are struggling to make ends meet. Sitian Jian is ordered to pray for rain, but unexpectedly, chaos is rampant. His actions attract a thousand demons to descend into the world, and in an instant, a sea of blood flows across the Dao Tai. Under the heavy pressure of the court, the Heavenly Supervisor Gao Shengyao is forced to use the mysterious death row prisoner Dugu (played by Simon Yam) to investigate the case. At this time, rumors envelope Chang'an and demons rise and the ghost night market hidden underground emerges. The demons and water ghosts who were hidden for many years reappear and cause chaos and stir trouble, making the case even more complicated and confusing. It seems that the omniscient Snake Scorpion Beauty has become Du Gu's target, but the outwardly righteous Du Gu seems to have an unknown dark past…...

Yan Ruyu, this petite girl with a straightforward personality has been different from other girls since she was little. She firmly believes that mutual affection is the fundamental principle of marriage. Because her father runs away from home and also she is avoiding the pursuit of Marquis Pingle/Li Xiu, Yan Ruyu inherits her father's official position and becomes an official matchmaker. In order to fulfill what she promises to her father and get the highest honor of the matchmaker world - the Golden Phoenix, Yan Ruyu attends the Matchmaker’s Feast and works hard to set up a lot of happy marriages....