Have you ever seen hundred-meter-tall giants strolling leisurely through modern human cities?
Have you ever imagined world-destroying divine birds dwelling above the skies, constantly gazing down upon the land below?
Have you ever heard of civilizations that call themselves gods, arriving from beyond the stars?

Starting from his first year of high school, Chen Du has the same dream every day.
In the dream, there is a blue crystal.
Thirty seconds later, the first wave of monsters appears.
These monsters all share a single goal: to destroy the crystal.