But Doyle has landed himself in detention for the first time. He is now at the mercy of the detention supervisor, McAlester (Jarlath Conroy), who loves to taunt his new recruits and make sure they know who's boss. He is the product of a harsh upbringing and doesn't see why kids these days should have it any different.
    
  But what happens when kids break down? When they start to believe everything they hear from their parents, peers, teachers and everyone else about who they should be and how they should act? When they start to conform? Well, you might say they grow up to be zombies.

But today, on Doyle's first ever detention, one kid grows too soon.

Today, many kids grow up too soon. Zombies overrun the school and Doyle must escape.
 
Doyle is not the only student who made it out of that detention class. His best mate and fellow detainee, Mark (Ben Morris), escapes with him but Mark is badly wounded from the attack. Of course anyone who knows anything about zombies will tell you that there is only one outcome in such a situation - Mark, sooner or later, will become a zombie.

Doyle must make it out through the school, encountering zombies, the skeptical and bitter caretaker, his own self-image and eventually his best friend. For Doyle, detention really is worse than he'd been told.