With the fox demon affair over, the capital is thriving again, and a pleased Empress Wu calls a grand autumn hunt where princes, nobles and skilled martial artists compete in riding and archery. Murong Ji, the young Khan of Tuyuhun, attends as a guest but finds himself suspected in a plot to assassinate the empress. To clear his name, he asks Pei Kun for help. Pei Kun, Yuchi Zhu, Han Dongqing and their companions team up again to find the real conspirator, facing danger and plenty of humor along the way, with peace between the Tang and Tuyuhun at stake. The story is a single-episode action fantasy adventure.