CHAK-KEI collapses during PE lesson and MIU-SUET reveals his physical conditions to YIU-WAH. YIU-WAH knows what is happening to CHAK-KEI but he tries not to say it. During a meeting with the principal, MAN-LIK requests the school to cooperate with him in fighting against drug abuse on campus instead of letting some teachers to investigate the case by themselves. MIU-SUET reveals that YIU-WAH might be investigating the case by himself. CHAK-KEI becomes dazed and confused after taking drugs and he stands on the edge of the rooftop dangerously. YIU-WAH rescues him tactfully but his head is injured while entangling with CHAK-KEI. The police discover some drugs in a snooker room and all staffs are arrested for questioning. The new leader of Tsun Hing Gang, SAI-LUNG, comes to the police station with his lawyer and he starts a quarrel with MAN-LIK. Lam Tin Kwong Memorial Secondary School is having a bowling match again with But Kau Yan School……