The evening study bell had barely rung when Ling Tong, in Class 3 of Senior Year Two, felt his phone vibrate. The entire class had been pulled into a bizarre group chat. The class monitor opened the first red envelope out of curiosity. The next second, his head was severed as if by an invisible thread and rolled onto his desk. Ling Tong realized in horror that this wasn't a game, but a deadly betting pool with no way out. To survive, he needed quick reflexes and a heart more ruthless than a demon's amid the schemes and treachery of those around him.