Episode 4

When CHUI-FA moves into TSZ-YING's apartment, she also brings along the long-handled broadsword that has been passed down from generation to generation in her family, which upsets TSZ-YING. In the restaurant, CHING-CHI runs into KELVIN, who, maliciously, hints to CHI-NGAI that CHING-CHI is really a piece of work. TSZ-BOK consigns his computer to his friend's store for sale, using the name "M31" as the contact. Wanting to buy a second-hand computer, CHING-CHI then goes to contact the original owner M31. After CHI-NGAI interviews his client, a school bus driver called LI MING, who has been charged with causing death by dangerous driving, he goes to have lunch with PAUL and CHING-CHI, during which PAUL recognizes that CHING-CHI is the one who started her apprenticeship with KELVIN……