After being defeated in a fight by a local gang, local official Lu Fengyang sends his weak and sickly son Lu Xiaoqing to study with a master of the Kunlun school of martial arts. Recovered and strong, he comes upon the Red Lotus Temple, and puts up there for the night. Unable to sleep, he begins looking around the palatial temple, and discovers a room decorated with many images of Buddhist demons, and an altar to worship them...