Because of HANG and MEI’s practical joke, all of the school computers in Hong Kong are infected with viruses. The principal orders HANG and MEI to leave the school. CHING, KIU and YAN negotiate with the principal to let HANG and MEI stay if they clean up the viruses. They thank the sisters for their help. There is a rumour that the school will cut staff. Every teacher suggests NAM to quit in order to save the others. NAM does so. However, the sports coach resigns first. NAM finds the coach to have a chat, which gives him a chance to make up with her. The interschool competition is coming. SUN, NIC, KIT, KIU and YAN train hard for it. KIT worries that his leading position is jeopardised by NIC. Meanwhile, SUN sports out KIU’s weakness and teaches her patiently. KIT knows how KIU feels about SUN and points it out to her, but she denies. NIC’s sister’s health is deteriorating……