Kelly Jo makes a momentous decision with the support of Samia, whilst Dean continues to spiral, proving that he's his own worst enemy. With most of the teachers away on an inset day, year 11 is busy with revision. Leading the pack, Libby coaxes the teens away from their study session, and they soon run riot in school, leading to a dramatic turn of events. Meanwhile, Joe discovers some unsettling news regarding the academy takeover, and Andrew has a setback after pushing himself too hard.