Everybody discuss the intention of the murderer and they believe that the two chemical plant owners are killed because they refused to make compensation after the explosion. HIM searches through the past records and she discovers that the engineer YUEN CHI MING was forced to take all the blame after the explosion while his wife and children are all killed during the accident. MING is wanted by the Vietnam police but he has disappeared after the incident. DING learns that the third chemical plant owner, MO YAU TAK, is returning Hong Kong for a funeral and this is a good chance to arrest the murderer. TAK is sent to the hospital after an injury and MING sneaks in successfully. YEUNG is safeguarding at the hospital and he finds SZ missing… SHUN joins a Halloween party and he discovers a horrible puppet on the tree. There are ID cards of three missing persons on the puppet……
