In 1999, the world ends, and the terror king descends. The protagonist and his companions navigate treacherous paths in different ways. He is arrogant and fearless, while she is silent but determined. 17-year-old high school honor student Gao Chuan investigates the disappearance of students at his school and unwittingly gets caught in a doomsday illusion, encountering monsters called "Things Outside Thought." A positive and adventurous story unfolds from a human perspective.