Mu Yu, the son of the Heavenly Dao of the Main Universe, did nothing but stay home playing games and using unique devices from various universes. This embarrassed his dad in front of the Heavenly Daos of those universes, so he was kicked out and dumped on a remote world at the edge of a small universe.
Just when Mu Yu thought life was hopeless, he discovered that this planet, called Blue Star, was inhabited, and even had novel things like video games. Mu Yu felt alive again. What he didn't know was that this remote world was facing the Abyss's encroachment...
It wasn't just this remote world that was threatened by the Abyss. The game worlds branching off from it were in danger too. Using his Heavenly Dao senses, Mu Yu received requests from characters in various game worlds. Jack, John's son in Red Dead Redemption 2, hoped his Uncle Arthur could live happily with his family. Genichiro Ashina in Sekiro: Shadows Die Twice hoped to save the land of Ashina...
By traveling through the worlds inside the games, Mu Yu's Heavenly Dao authority began to level up.
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