The bell for evening self-study had just rang, and Ling Tong from Class 3, Grade 2, found his phone vibrating, and the whole class was pulled into a weird group chat. The monitor opened the first red envelope out of curiosity. The next second, his head seemed to be cut off by an invisible thread and rolled down on the desk. Ling Tong discovered to his horror that this was not a game, but a death bet that he could not quit. If you want to survive, you must not only be fast, but also be more ruthless than the evil ghosts in the human heart.