KAU is promoted to be a CID. In a case, he meets CHEUNG KWUNG, a rich merchant and his daugther Ll TAl. KWUNG does not trusts the others and he is alerted when the identity of KAU is observed. WAl finds a secret advertisement on the newspaper. After investigation, he finds that KWUNG is a killer who killed a police-captain. He wants to prosecute him but is stopped by LI HO. Thirty years ago, KWUNG eloped with FUNG KIU and arrived at Hong Kong. r They could not find a living and he was forced to break the law. KWUNG robbed a bank but was arrested. His boss wanted to set him free by bribing the police-captain. He agreed to arrange his escape by manipulating a traffic accident. However another team of policemen arrived. In chaos, the police-captain was killed by KWNG who escaped then. Then KWUNG went to Malaysia, leaving FUNG KIU behind. WAl found her and they had mercy on her. They took good care of her and KAU.… ...