When Henry fails yet again to hand in his homework for the umpteenth time, he has no idea that this will set off a chain of events which will see him forming an unlikely alliance with Moody Margaret, the infuriating girl next door, and his irritating little brother Perfect Peter, outwitting corrupt School Inspectors and toppling an evil Headmaster, winning a talent contest and facing his ultimate nemesis with no way out.
Life is not fair! Horrid Henry feels that the rest of the world is against him and he wages a constant war against the adults. Like any headstrong young boy, he is determined, relentless, he doesn't hold back and he never admits defeat! He will stop at nothing to outwit the enemy and teachers, relatives and babysitters avoid him at all costs.
Worlds collide when Henry makes plans to spend Saturday on the sofa watching a "Gross Class Zero" marathon — and his favorite characters come to life!
