Fan Song, a programmer who drives for his boss, encounters a bronze mirror from the Eastern Han Dynasty in a museum. From then on, he can see the answer from any reflective surface. When the numbers in the mirror pointed him to the mountainside of a village deep in the Qinling Mountains, he took Huang Fan, whom he had just met, into the mountain, only to discover that the word "men" on the silk book might have been left to him two thousand years ago.