The Night Watchman of the Great Song

During the reign of Emperor Renzong of the Great Song, the surface presents a flourishing literary age, but in reality, yin and yang are out of balance, and the air of the underworld pervades. Within the city of Bianjing, bustling by day, at night it becomes a 'ghost market' where demons roam. To maintain this fragile balance, the court secretly establishes the position of 'Night Watchman'.