Hamilton High is no place for a teacher who cares. Teacher Sam Decker doesn't care anymore. He's quitting. Sam marks his last day in the battleground of public education by getting saddled with the detention class after hours, playing warden to a pack of rebellious students, the worst troublemakers in school. But Hamilton High is about to become an all too real battleground when a well-organized group of killers armed with automatic weapons and explosives invade the supposedly deserted school after hours to use it as an operating base for meticulously planned armored car robbery. Led by the brilliant and sadistic Chester Lamb, the invaders are surprised to discover Sam and the kids from the detention room are still inside the school. The hunt is on as the killers ruthlessly stalk the teacher and students through the school's halls and classrooms, while Lamb tracks them on the surveillance cameras...

The next door neighbors Nell Bedworth and Woody Deane have opposite behaviors and hate each other: the virgin geek Nell is polite, sensitive and well-prepared to go to Yale, while Woody is rude and his greatest expectation is to join a mediocre university due to his abilities playing football. When Nell and Woody are assigned to visit a museum together, they argue in front of a statue of an Aztec god. During the night, their souls swap bodies, bringing difficult situations to them. They first try to damage each others reputation in high school, but soon they discover that their dream of joining college can only happen with mutual respect and support.