Sound the bells

Arch wood High School is the school for the behaviourally challenged. Life insurance is recommended to teachers, kids run a muck and the school is maximum security. Due to daily escape attempts by students teachers come up with a system where the school bells act as the keys to all doors and gates in the school. 4 bells a day, 2 to lock and open the class rooms and 2 to lock and open the gates containing unruly teenagers for 6 hours a day. Since the bell system the kids have settled down and have been broken into common school kids.

But what will happen when the bell system is tampered with, allowing no escape? Will new student Andrea-Rose know what to do and who to trust? Who will make it out alive