The mortal girl Su Yanli accidentally entered the ancient immortal mansion and accidentally awakened the spiritual pet Xuan Xiao who had been sleeping for thousands of years. However, she was targeted by the mysterious saint Yun Qiwu. When the resonance of the ancient words activates the mechanism of the Immortal Mansion, the secret pattern of the blood contract appears on her back, and the dusty fairy murder case gradually emerges. Is Yun Qiwu's approach a conspiracy or a redemption? The silence of the law enforcement elder Mo Lichen, the rhythm of Sanxiu Liu Fuyao, and the red-eyed child entangled in her dreams are all links in the chain. She is not the chosen one, but the last sacrifice of the Immortal Mansion - and Xuan Xiao, in the shape of Nine Tails, is tearing apart the lies of heaven for her.
