The Buddhist monk Tangseng arrives with his disciples at a mountain monastery, and he is visited in a dream by someone claiming to be the ghost of a murdered king. The ghost claims that the king sitting on the throne is really an evil demon. Is he telling the truth or is he actually a demon in disguise? Tangseng's chief disciple, the monkey king Sun Wukong, offers to go to the king's palace and sort things out with his iron rod. But things do not...