The police finds out that the victim is SAM, a special reporter who is an expert in disclosing the famous people's privacy. He then extorts money from those people. The police believes that the motive for the murder is for revenge. The police sends YUNG and YEE to investigate the case. They find a bank pass book stating a recent deposit amount to hundred and fifty thousand dollars. They also find that the 'Angel' is actually a nightclub girl, ANGEL. YEE is ordered to look over her twenty-four hours a day. In order to get rid of the police, ANGEL disguises as a pregnant woman. She is crashed down by a car when she tries to escape away. She is seriously inured. She tells the police that she was extorted for hundred and fifty thousand dollars for concealing the fact that she had crashed her ex-boy friend to death. The police knows that she is not the murderer. They got some clue from SAM's watchman. They suspect YE.… ...

YEE discovers that YE had withdrawn hundred fifty thousand dollars. The date she withdrew the money was the same day SUM deposited the money. YEE also finds a photo with the image that YE is darting an arrow. The police suspects YE. They start a thorough investigation on YE.YE arranges to go to the Lobster Island with YEE. YUNG and CHIT follow them by car. YE arrives the destination earlier than YEE. She arranged everything in the female toilet before YEE arrives. They witness YE who is trying to shot YEE. They shot YE so as to stop her. YEE jumps forward to rescue the murderer. She then knows more about the case. He follows YE's elder sister to a children centre. He is shocked to find out that this centre named ‘Angel’.

YUNG finds out that the handicapped children at 'Angel Children Centre’ were all victims of the prohibited medicine 'Aldalin'. Meanwhile, YE's statement stated that her elder sister had taken this medicine which made her given birth to a handicapped baby. This in turn destroyed her marriage. The victim, SUM, had extorted money from her. YE thus killed SUM for redemption. YE's elder sister has eventually told her current husband the truth. They give statement at court in the hope of mitigating YE's charge. The case has eventually come to an end. YEE and YUNG and CHIN's girlfriend go to the Lantan Island to visit the Buddhist Statue. YUNG has taken the wrong knapsack. Later, he receives a phone call from a mysterious woman who wants to get back her knapsack. YUNG goes to meet this woman according to her instruction. Unexpectedly, he finds that the owner of this knapsack had been died a year ago.