Chao, a young boy in a wheelchair, eagerly anticipates starting school to forge friendships with peers. However, upon entering his classroom, the ordinary day takes a bizarre turn. As the children grapple with a distorted reality, they uncover a startling truth – their teacher is a malevolent creature in a clever disguise. This deceptive being threatens dire consequences for students who fail to solve a punctuation-related query. Can any of the students unravel the mystery in time to evade the impending danger?