In the year 8102 of the Earth's calendar, the foolish Emperor Ling believed that it was a great sin for the human world not to believe in gods, and believed that the human world had no value in existing. Therefore, they united with the Shura world to cut off the channel supplying spiritual power that had been maintained for tens of thousands of years. What the spirit world never expected was that the lack of passage would lead to an imbalance of spiritual power in the human world, breaking the balance of the human world, the spiritual world, the Shura world, and the underworld. The human world has become purgatory. When spiritual energy is out of balance, evil spirits begin to breed rapidly. These undead spirits are causing trouble in the three realms, making the spirit world even more vocal in protest. To make matters worse, the underworld refuses the undead to enter because their life span has not expired. Reluctantly, the spirit world, the Shura world and the underworld began to negotiate. The talks lasted for ten years and finally a treaty was concluded. The underworld is willing to open its doors to let the dead souls in and at the same time to reincarnate the evil spirits. However, the balance of the four realms has been broken. It is better to merge the four realms into one world. The rules of this world must be set by Pluto Xiao Feiyin alone. The Spirit Emperor was dissatisfied with this treaty, but due to the protests of the people of the spirit world, he had no choice but to sign it. Emperor Shura understood that he had made a big mistake and signed the treaty willingly. However, during the merger of the four realms, a conflict occurred between the spiritual world and the Shura world, and a melee broke out with the human world as the main battlefield. During the melee, the human world's spiritual energy and evil spirits were once again unbalanced, and the hell on earth was well deserved. In order to calm down the evil spirit, the Spirit King once again went to the underworld to discuss the seal, but was severely cheated by the underworld. From then on, everything was fine until Liu Li, the queen of the underworld, went to play in the human world...