After a strange accident, Yin Yang wakes to find the world completely turned upside down. Gravity comes from the sky, an endless abyss hangs overhead, and the earth floats above. People walk on clouds beneath their feet, rain falls from the ground back into the heavens, and waterfalls surge upward.
In this inverted world, every familiar rule collapses. Time flows backward, the dead await birth, and the elderly grow younger by the day. Language itself has been reversed: "love" means "hate," and "save" means "destroy." To survive, Yin Yang must learn to walk upside down and distinguish truth from warmth amid a world of inverted lies. He ventures into the Upside-Down Royal City hanging from the ceiling of the sky and gets caught in a whirlpool of political intrigue, only to glimpse an even more terrifying truth: this inverted world is not another realm, but a gravitationally reversed projection of a slice of time on Earth.
The laws of the two worlds begin to collide violently. Entropy and negentropy clash, and all things teeter on the brink of collapse. To get home, he must find the "pivot" that holds this inverted reality together and break it with his own hands. This is an ultimate journey of reversals involving gravity, time, and reality. When everything is upside down, who is truly the right way up?
