The three girls have been inseparable best friends since the third grade - Josie, the athletic one; Perri, the brilliant, acerbic drama queen; and Kat, the beauty, who also has brains, grace, and a heart open to all around her. But their last day of high school becomes their final day together after one of them brings a gun to school to resolve a mysterious feud. What transpires that morning at Glendale High rocks the foundations of their suburban Baltimore community...