Blair and Chuck sneak away to the school science lab after classes, where they start getting intimate. However, Blair is worried her boyfriend Nate will find out, so she suggests they leave. When they try to leave, they discover they are locked in. Strange noises and a blackout cause panic. Blair finds matches and petrol, worrying her. The next morning, headlines report two students died in a suspicious fire. A mourning Nate tells a friend this ensures Blair will always be his.