what begins as an ordinary stormy saturday at hogwarts turns into a nightmare after a group of curious seventh-years uncovers a forgotten chamber hidden beneath the castle and unknowingly awakens an ancient curse. as students become possessed by sadistic, shape-shifting deadites that remember, taunt, and hunt the people they love, hogwarts descends into chaos, forcing students and professors alike to fight for survival while the castle itself seems determined to keep the evil trapped inside with them