Amelia hace un fatídico deseo en su 40 cumpleaños: volver a cumplir 18 como en 2002. Pero no tarda en arrepentirse tras empezar a revivir ese día... en bucle.

A struggling primary school teacher is forced to take drastic action because of a foul-mouthed, violent student, and uncovers how her community will turn a blind eye to the most outrageous events to preserve harmony and their sense of safety.