After investigation, the ICAC discovers that the recent case is not done by those existing gangs. Later LAY finds a man who delivers leaflets. She suspects that the man has stolen the others' statements to apply credit cards. LAY informs her supervisor. The ICAC sends members to keep an eye on the man. it is found that the man is called STEPHEN. It is certain that STEPHEN works with a postman and there are some other people in his group. They lurk there to get the bill which has been thrown away by STEPHEN.