Fifteen-year-old Jimo Ming looks exactly like a boy in both personality and appearance, but he has the body of a girl. After the graduation ceremony, I discussed with my like-minded old friend Utopia that we would go to the basement of our community to replay the secret room game from two years ago. However, this slightly childish game completely broke their originally peaceful and carefree ordinary life.
Time stopped at the moment they entered the bottomless black cave. These two young men in their prime were trapped in this seemingly endless criss-crossing, winding and treacherous maze. Hidden at the end of those countless mysterious corners, is it hope or death? What kind of puzzles and mysteries are hidden in the deep and dark tunnels? What awaits them will be endless challenges and panic.