The abbot of a humble monastery in the Valley of Sorrows calls upon Master Li and Number Ten Ox to investigate the killing of a monk and the theft of a seemingly inconsequential manuscript from its library. Suspicion soon lands on the infamous Laughing Prince Liu Sheng—who has been dead for about 750 years. To solve this mystery and others, the incongruous duo will have to travel across China, outwit a half-barbarian king, and saunter into (and out of) Hell...