Last year, Ollie Morcombe was a star pupil, popular and a gifted musician.

Then, after the accident, everything changed. Now he's an outcast, a prime target of the school bullies who have made his life a living hell.

Today - the last day of the school year - he's brought those bullies a gift. A homemade pipe bomb.

What has driven a model student to plan an unspeakable revenge? And with the clock ticking down to home time, what can anybody do to stop him?