SEE calls CHIT and tells her that she has strong prove to support her idea. Then she does not turn up. Later her corpse is found in her house. She was suffocated by a cushion and it seems that the killer wanted to find something before he left. MAN is the suspect but his brother WING can prove that he is innocent. MAN is questioned again as he has bought an insurance policy for SEE. They have joint account and a flat. On the day when SEE was killed, he withdrew five hundred thousand dollars from the account. MAN claims that he has another witness but the witness has migrated to the USA. He cannot prove that he is not the killer. Later MAN falls down from the roof of a building and dies. It is regarded as a suicidal case as MAN feels guilty. However it is wrong as MICHAEL returns and proves that MAN did not kill SEE.