There is a strange mountain in the world, Penglai.
No one knows where the mountain is and can't find it.
There is a saying that has been circulated for generations in the human world. Penglai is the top existence in the world, symbolizing supreme power. Even the two realms of immortals and demons have set rules because they are afraid of its existence: ordinary people are not allowed to be killed indiscriminately, and fights with auras above level 10 are not allowed in the human world. Otherwise, Penglai law enforcers will directly kill both fighting parties to ashes - a completely indiscriminate attack, regardless of right or wrong!
The dragon king from another world was reincarnated as a human son: Dongfang Xiaofan.
Unable to abandon his pride as the Dragon King, he ran away from home. Due to his own sins, he released the great demon Li Ren who had been sealed for countless generations. From then on, the joyful journey of a humanoid dragon king and a ruthless demon king started smoothly.