After the emperors died, in order to pay off their sins, they worked hard in the underworld. Their only entertainment was mahjong and computer games.
With the development of science and technology in the real world, human beings abandoned their physical bodies and lived in the virtual world. However, the smart computer, the carrier of the virtual world, wanted to eliminate human beings, so they created viruses and put them into the virtual world. The only chance for human beings to survive is to eliminate the viruses.
The King of Hell threw all the emperors into the virtual world and asked them to help mankind defeat the virus.
As the most playful emperor in history, Zhu Houzhao thought he was just playing a holographic online game!