Madness and unawakening sleep, Randolph syndrome. This new illness is slowly but steadily approaching humanity, caused by the vast underground world Asylum that appeared in Antarctica. It contains strange creatures unlike those on Earth, as well as unknown resources. People risk their lives in the depths of this mysterious new world to gain immense wealth, further organizational plots, or satisfy their own ambitions. And here alone, a young man with a wish in his heart attempts to challenge the front lines of Asylum.