Chen Mo, an ordinary data analyst, makes an unexpected discovery: strange sound waves deep beneath the sea have remained unchanged for ten years, and they match the “dragon’s roar” recorded in ancient texts perfectly. Using rigorous logic, he rules out every natural explanation and gradually uncovers the truth about the universe as a “cluster of grape-like worlds”: humanity’s frantic development is accelerating the expansion of its world, causing violent pressure against the barriers separating it from neighboring worlds. Dragons and mirages with no original forms are both shadows spilling across those boundaries. Fighting alone against the world’s prejudice, he tries to ease the crisis between the two worlds and protect the universe’s quiet balance of coexistence.