When high school student Azusa survives a suicidal leap from the school rooftop, she thinks the worst is behind her. But a month later, a group of masked intruders seizes the school, imprisoning a pregnant teacher and vanishing with the principal and several male students. As chaos unfolds, Azusa receives a mysterious envelope from a classmate containing puzzle pieces that seem to hold the key to the bizarre takeover. With time running out, she must piece together the fragments before the masked figures close in, uncovering a chilling connection between the puzzle and the school’s dark secrets.































































