In a world of immortality shrouded by strange forces, monks gradually lose their minds and become crazy existences in pursuit of power. The young monk Lin Fan accidentally discovered an ancient book that recorded the story of a monk who lost his mind. As he deepened his cultivation, the edges of his sanity gradually blurred, and the world around him became increasingly distorted. In order to save himself and his companions, Lin Fan must find light in the darkness, reveal the secrets hidden behind the world, and fight to the death with irrational enemies. In this journey full of weirdness and challenges, Lin Fan not only had to face the fear of the outside world, but also had to fight against the demons in his heart, and finally found the true meaning of strength and reason.