Chu Chai Chain has hurt his leg. Sir Choi recognizes that he is no longer a young man, therefore, he suggests that Chu Chai Chain should be transferred to do some clerical work. However, he strongly opposes this proposal. Chu Chai Chain is on sick leave. As he has nothing to do at home, he shortens his leave. In order to avoid being transferred to clerical work, he changes his style and sends out tickets frequently. He hopes that he can deal with a big case before his retirement. Kam Fai knows Chu Chai Chain's psychology; he gives him a helping hand. He asks his friends to let Chu Chai Chain charge them. Chu Chai Chain is moved. Chu Chai Chain has to take a retest. He worries that if he fails, he has to take a clerical job. Thus, he uses the pretext that his leg is injured in order to postpone the date. Chu Chai Chain goes to a supermarket to buy anti-rheumatic oil for King Ku. At the same time, the supermarket is robbed……
