Since his first year of high school, Chen Du has had the exact same dream every night. In it, a mysterious blue crystal appears, and thirty seconds later, monsters begin attacking with one goal—to destroy it.

As the dreams continue, Chen Du witnesses impossible sights: giant beings walking through cities, world-ending creatures watching from the skies, and godlike civilizations arriving from distant stars. What first seems like a strange nightmare gradually reveals itself to be connected to a far greater truth, one that may determine the future of humanity itself.