When the heaven and earth first opened, the way of heaven was the law of all things, stabilizing the cycle of reincarnation in the three realms. As time goes on, cracks in the heavenly path gradually appear, spiritual energy is exhausted, yin and yang, cause and effect, and reincarnation are completely disordered, and disasters sweep across the three realms. Only by gathering together seven Heavenly Hearts that carry the core laws can Heavenly Dao be repaired. The underworld judge Su Nian discovered the truth, but was killed for blocking the conspiracy, and the judge's scroll was lost. His daughter, Su Hongxiu, was hiding in an oil-paper umbrella, waiting for an opportunity to find fragments for revenge. The heaven is divided into two factions. The immortal Xuan Chengzi is dissatisfied with the fair checks and balances of the old heaven and colludes with the Japanese Blood God Sect. Japan broke away from the shackles of heaven, and monks plundered souls to refine fake peaches, trying to use the heart of heaven to reshape the power of Shinto. Civil strife broke out in the demon world. The elder Mo Yuan advocated joining forces to mend the sky, but was plotted by his second uncle Mo Tianxing, and his demon heart was taken away and sent to Japan. Mo Yuangou lives in the world, looking for fragments of the devil's heart everywhere, and the fragments are actually closely connected with the heart of heaven. Disasters are everywhere in the world, and demons and wandering spirits are rampant. Detective Ling Shuang and Taoist priest Zhang Daoling work hard to eliminate evil spirits. The key to reversing the crisis is the humble Hengwei Escort Bureau. Xiao Jue, who is in charge of the game, is a lifeless person whose abacus can deduce the cause and effect of the three realms; the bodyguard Yan Shisan kills monsters with a broken knife, and every battle consumes the remaining souls. On a rainy night, a messenger sent a mourning stick containing a fragment of the Heart of Heaven. It had to be delivered to Fengdu within seven days, otherwise the Three Realms would be destroyed. Xiao Jue believed in the promise of the escort agency and set off to break through the ghost gate with Su Hongxiu, Ling Shuang, Zhang Daoling and Yan Shisan. Enemies from all sides followed closely: pursuers from heaven, killers from demons, and Japanese ninjas intercepted and killed one after another. There were also mysterious forces hoping for the destruction of heaven and return to chaos. Accompanied by abacus and broken knives, a group of people traveled across the three realms to find the heart of the Tao of Heaven, a catastrophe that spanned the five realms.