In the ninth year of the Yonghe period of the Jingguo period, monster disasters occurred frequently in the capital, and strange murders occurred one after another in the city of Chang'an. Lin Yuan, the eldest son in charge of the Demon Hunting Department, is gifted but perverse. He has solved numerous cases but has made many enemies due to his venomous tongue and arrogance. Yuan Zhi, the youngest daughter of the Yuan family in the south of the city, is a descendant of a family of monster hunters but has low spiritual power. In order to find out the mysterious disappearance of her brother, she has to cooperate with the "Prince of Hell".
A marriage contract forcibly tied the two of them. Lin Yuan initially sneered at this "half-baked" monster hunter: "Follow me, don't hold me back." But he glimpsed her deep tenacity and wisdom on the verge of life and death. Yuan Zhi was unwilling to be restrained and resisted many times: "If the prince can only do this, how is he different from a monster?"
When skinning cases, soul painting cases, and puppet cases follow one after another, the clues vaguely point to the secrets of the royal family. During the investigation, the two gradually discovered that behind the evil disaster was a terrifying conspiracy to overthrow the dynasty. Lin Yuankou defended her with integrity, but Yuan Zhi saw through his arrogance and responsibility in the tit-for-tat confrontation. Under the contract of forcible robbery, there is a secret feeling of life and death.
Purpose: To explore how to use wisdom and courage to break fate amidst prejudice and constraints, seek justice and true self, and finally overcome evil and cherish each other.