The story follows Gray, a 16-year-old boy living in a small, dingy apartment with his weary mother. Despite his initial reluctance, Gray agrees to attend an elite boarding school that promises a brighter future without financial burden. However, upon arrival, Gray quickly realizes that the school's strict rules and mysterious practices hide a dark and dangerous reality. When students who score below 70 on exams face deadly consequences, Gray becomes determined to uncover the truth and find a way to escape the perilous institution.