This is not a cool story about a time traveler, but a story about a young man living in the mud, step by step, becoming light. In the winter of the second year of Emperor You's reign in the Northern Song Dynasty, Li Yanzhou, a 14-year-old runaway boy, carried the account books that exposed the corruption of the Salt Administration, and together with the 12-year-old medicine girl Bai Yu, the idiot Xiaoliu and a group of ordinary people crushed by fate, struggled to survive in the wind and snow of Shucheng. They have no power, but they protect the truth with their flesh and blood; knowing that the road ahead is death, they still take a step towards Bianliang - just to let the blood-stained account book become the first light to pierce the darkness.
