Wen Yan was once the most skilled formation-diagram artist in his sect, but on the eve of the grand ceremony, his sword registry was taken away and he was demoted to the artifact workshop. Only when he tossed out paper puppets to catch falling civilians on a collapsing plank road, and later unfolded a mechanical map of mountains and rivers beneath an ancient bridge on a snowy night, did he discover that someone had secretly rewritten the great protective formation guarding the province. To clear his name and preserve the legacy of the immortal sect, he has no choice but to wield paper as a weapon and use formations as his path, exposing one conspiracy within another before everyone's eyes.