Tianyu is the snake king of the demon world, a king that even the Emperor of Heaven and other demon kings dare not offend. Xuan Bing is one of the famous elites of China in the mortal world. Suddenly one day Tianyu felt bored with everything in the snake world and wanted to destroy it all. The demon kings in the demon world were startled and quickly thought of a way. Finally, they went to the mortal world together...