Eight vulnerable girls and their helpless teachers are forced off a school bus and held hostage. The madman who has them at gunpoint has a simple plan: one hostage an hour will die unless the demands are met. Called to the scene is Arthur Potter, the FBI's best hostage negotiator. He has a plan. But so does one of the hostages—a beautiful teacher who's willing to do anything to save the lives of her students. Now, the clock is ticking as a chilling game of cat and mouse begins.