This is the End

The United States was changed forever when a group known as the Macabre Army came forward, killed all the students and teachers at three high schools and then bombed the Washington, D.C. metropolitan area.
Four months later, the M.A. hasn't been active for over a month. In celebration, Trey Davis's high school is holding a carnival.
But when the Macabre Army shows up, all hell breaks loose for Trey and his friends.