CHIT wants to move to Canada with MAN but at the last moment she decides to stay with YUNG. YUNG is excited. YUNG and CHIT move to a flat near to YI's house. YI is discontented with LI SI LUNG who records his illegal parking every day. YUNG joins YI's team together to CHAK WING TIN who has a strange character. CHU SAU KWAN is CHIT's aunt. She lives in CHIT's house. YI’s aunt also visits YI. YI accompanies his aunt to Guangzhou to receive treatment. On the return journey, LUI CHIN MEI sees a man being pushes down hill. The victim is her father LUI SAI HO.

MEI is grievous and the case is complicated. YI looks after MEI and MEI thanks him. They mutually impress each other. KWAN does not like CHIT learning cooking from YU PIK LING. LUNG is transferred to YUNG's team and YUNG instructs her to be YI's partner. LUNG knows that she is in trouble. TIN follows the clue that one million dollars has been taken away from HO's account. YI pays MEI a visit and he finds a telephone number in HO's room. After checking he knows that KWOK SHU SUN had borrowed HO's money and they had had a quarrel in a bar before HO was killed. MEI invites YI to stay with her in Lamma Island. They are drunken and fall asleep together. The next morning, SUN's corpse in found on the beach.

A witness states that SUN jumped into the sea and killed himself. YI suspects that he killed himself as he felt guilty. However TIN does not accept YI's conclusion. YUNG and his colleagues check SUN's house and from SUN's MTR tickets and appointments, he could not be with HO when HO was killed. YUNG appreciates TIN's talent. As YI and TIN have different ideas on the case, they argue. At the same time, YI is attracted by MEI's charm. YUNG finds the relationship between HO, SUN and MEI's mother. MEI's mother was pregnant when she married HO. On the other hand an old worker reports that after MEI's mother death, HO raped MEI when he thought MEI was her mother. YI is confused and keeps an eye on MEI's behavior and character. YI's aunt is hypnotized and recalls that she did not witness HO's pushed down hill. She thought she saw the case as instructed by MEI. It is clear that MEI is involved in the case.

YI recalls that he found some salty smell on MEI's hair when they were on Larnma Island. POON CHI TO, a psychiatrist, warns that MEI is a dangerous person on the brink of explosion. YI flatters MEI but at the same time allows her to see him dating LUNG. MEI is confused and insane. MEI invites YI to visit HO's tomb together. YUNG and the others get ready to take action. YUNG asks LUNG to go home as her mother has fainted. Later YI finds that LUNG's mother did not have any problem. He realizes LUNG's dangerous situation and rushes to save her. MEI wants to push LUNG down the cliff with her car. YI arrives just in time to save LUNG and arrest MEI. MEI admits what she has done and kills herself in the police station.