CHUNG SHUN and CHUNG YI are members of the Big Circle Gang. They work with MING to deal with KIN NAM. In chaos, they kill a drunken man. NGOR is WONG’s secretary. She takes care of everyone in the police station. YUEN and FAT see the corpse of the drunken man when they are on patrol. SAN checks the body and identifies the type of the gun used to kill the man. YUEN likes her job but her family worry much about her. YUEN suspects CHUNG SHUN and CHUNG YI. She checks their identity cards. They run away and they have a gun fight in the market. YUEN has to be investigated. She meets CHING FUNG. FUNG lays a trap to arrest CHUNG SHUN and CHUNG YI. However, his plan is spoiled by YUEN who comes to arrest them. They have a gun fight again.