Hidden in an old building in Tinghuaili, Nancheng is a supernatural detective agency that specializes in solving weird things. Yun Xi, the silver-haired president with strange eyes, uses the red pupil as a key to enter dreams, search for souls, and extradite dead souls. The red pupil pattern can even lock the trace of the soul and open the reincarnation passage; Lei Ze, a demon slayer with a pure Yang physique, and Lei Cheng, a zombie partner transformed into the ancestor, use their long swords to slay demons and suppress evil.
Grief-stricken Li Ming came to the door, pleading for the extradition of the soul of his late wife Zhao Lili, but he uncovered a shocking conspiracy - Zhao Lili's organs were stolen after her death, and behind this was the collusion between the "Soul Eater Club" and the "Nether Bone Alliance". The former is controlled by the evil mage Wu Xi, who uses contracts to trick elites from all walks of life into selling their souls and taking their bodies to survive; the latter uses darknet platforms to trade organs and transport Nancheng victims abroad in an attempt to turn the place into a spy base.
The office was attacked and Yunxi Hongtong was blocked. In a desperate situation, Lei Ze found the ancient secret of the Lei family's "Yin and Yang Unity" and used ancient artifacts to awaken the power of fusion. In the end, Yunxi and Lei Ze defeated the "Soul-Eating Club" and joined hands with the criminal police captain Shen Xiuwen to destroy the "Nether Bone Chain Alliance" and thousands of dead souls were able to rest in peace. But the storm has just subsided, a new commission has arrived, and more secrets between Yin and Yang are waiting to be revealed.
