ON attacks PING. Fortunately, PING is protected by a spell and could escape from the danger. ON again bursts into the police station. He captures WAI and brings him to their cave. ON recognizes WAI. WAI also recognizes ON and his family. WAI feels sorry for ON and his family. Later, ON lets WAI go. WAI tells everyone the story. In fact, ON and his family came to Hong Kong years ago. He aimed at discussing the anti-pirate policy with the government. Unfortunately, they had met a plague and the whole family died. WAI has employed somebody to send their corpses back to their country. However, WAI does not know why they have become vampires. WAI then asks the corpses-caretaker and knows that the caretaker has mistakenly thrown their corpses into a marshy place. In order to confront against the vampires, the inspector asks FOK ON NING for help. NING reports his duty……