In Bianjing in the Northern Song Dynasty, Zhao Dezhu, a clerk at the Mahang Street Shop, shuttled through the alleys every day to deliver goods. There is no road that he is not familiar with at the back door of the rich and powerful, or in the corner of the dark alley. No one was involved in the disappearance of a maid, but it triggered the knot in his mind that his sister had gone missing ten years ago. An errand boy can't do big things? He insists on using a pair of feet to "deliver" the justice of the entire street to everyone's door. There is suspense in the city, and fireworks solve the case - if people's hearts are bright, there is no need to be afraid of the long night.
