The story of a Tang Tang who traveled in time into the territory of the Western Regions. Along with his motorcycle.
In the Tang Dynasty there existed a special institution - the Undesirables (Bu Liang Ren) - who served as magistrates but were criminals. A case of a dwarf puppet master manipulating a parasite to kill a man leads Pei Mou, the undesirable marshal, and others into a maze of dilemmas.