CHUNG, who is a merchant, is found killed in the suite of a hotel. He was strangled to death when he was in a comatose after being hit. He money has been taken away. CHUNG and his cousin LAM won six hundred thousand dollars from the horse race. He took the money to a ballroom alone as LAM had to go home for private business. There CHUNG wanted to hire JUDY to play SM with him but he was refused. BETTY states that JUDY did not go with CHUN. BETTY’s statement is further supported by her customer FAY. Thus JUDY is not regarded as the suspect of the case. CHIT visits a doctor from whom she learns a case of a poor baby girl. The baby girl is waiting for financial support to go overseas to receive proper treatment. CHIT reports her case and it draws public attention. An anonymous old man donates six hundred thousand dollars to support the baby girl.

The surgery is successful and the baby girl regains her healthy. CHIT has done much for her. CHIT is surprised to find that the baby girl's mother TUNG TUNG is BETTY. BETTY pays little attention to her baby. CHIT is discontented and always looks after the baby for BETTY. LIN is the owner of the hotel where CHUNG was killed. He is found dead in his house in Sheraton. He died after drinking poisonous milk. He has a complex family. CHU is the daughter given birth by his ex-wife. KWONG is his son-in-law and his nephew KAI is his wife WA's good friend. WA is much younger than LIN. CHU, KWONG, KAI and WA have different people to prove that they were not in the house when LIN was killed. The newspaper hawker reported that there was a mysterious lady wandering outside the house when LIN was killed. When the murder was committed, the rear door had not been locked. Every day SHEUNG takes the milk there.

Another witness tells the police that CHU's car was outside the house when LIN was killed. CHU changes her statement. She claims that. before going to the airport with KWONG, she visited her father and seek financial support from him for her husband. However the time she left was close to the time of LIN's death. CHU accuses WA and KAI as the killers as there is filthy relationship between them. WA accuses CHU as CHU is unable to pay her debts. FAY is also suspected as they had quarrels. FAY works as a cook in LIN's hotel. He was introduced to the job by KAI. FAY's working attitude is poor. KAI and RAY have long not met each other. On the day when landslide affected Tuen Mun, they came across each other in a restaurant in Yuen Long, they did not greet each other. As the landslide and the murder occurred on the same day, the police find that FAY's statement supporting BETTY becomes invalid.… ...

Before she died, BETTY called CHIT. BETTY told CHIT that she had the idea to kill the baby so as to get compensation from the insurance company. Luckily the baby is all right. CHIT also heard the music of a wind bell. CHIT recognizes that the music is the last piece in the department store. The police go to the department store and the shopkeeper recognizes BETTY and reports that she and a man came and bought the piece. CHIT finds the man but the shopkeeper firmly states that he is not the one. The man warns CHIT to mind her own business. It is found that BETTY's skin tissues was left in CHUNG's fingernails. The newspaper hawker also identifies her as the mysterious girl outside LIN's house. Thus it is clear that BETTY killed CHUNG for money. But why did she kill LIN? Moreover it is believed that BETTY did not kill herself. She was killed by the black hand who wanted to keep the secret. The man threatened CHIT is FAY.… ...