Lin Yu traveled through time and became a demon king. Unexpectedly, his true identity was a righteous undercover agent who had lost all his cultivation. At this time, he activated the "god-level entertainment system", covering the world of immortality with the Internet and obtaining modern mobile phones. In order to prevent the war between good and evil and protect himself, Lin Yu used mobile phone marketing and a large number of software applications to intervene in the struggle of righteousness, practice and life with entertainment, step by step bringing the world of immortality into the era of online entertainment, and finally succeeded in deceiving both good and evil, making everyone forget about the war.
