In 2024, "demonization" mutations occurred one after another in universities around the world, and the originally ordinary campuses became entrances to other worlds. During a trapped experiment, Liang Yuchen, a first-year high school student, accidentally obtained the "Thinking Acceleration" golden finger - which can slow down the flow of time 100 times and use absolute rationality to deduce the battle situation. When his classmates become demon puppets, the principal transforms into an evil priest, and the entire city falls into a conspiracy of alien invasion, Liang Yuchen must find the truth in a campus with broken rules. Every life and death decision is a game between reason and sensibility. He has three days to stop the demon from coming, otherwise the whole world will fall into doom. But as he gradually gets closer to the truth, he discovers that the man behind the demon invasion is actually the person he trusts most. What's even more desperate is that he must choose between saving the world and protecting his lover, because in this war, one of them is destined to be sacrificed. The collision between ideals and reality, the tearing between reason and emotion, how can an ordinary high school student complete the impossible task before the doomsday comes?