The neon lights of the city unexpectedly intertwined with ancient legends, the sky turned upside down, and giant monsters from the mountains and seas emerged from their cocoons. Lin Yan holds the bronze ruler and the broken pages of mountains and seas left behind by his grandfather, using his IQ as a spear and ancient books as a shield. In the catastrophe of the collision between the city and the mountains and seas, Lin Yan explores the truth among the ruins, protects the bottom line of civilization, and uncovers the ultimate secret of the "inverted sky".
