To Live in Vain

In the hidden corner of the earth, the so-called "cave sky" is not a legend, but a dimensional space that carries all the mysteries of the world. They are hidden in reality in various forms - it may be an endless time and space tunnel, a deep and dark cave that cannot see light, or the wooden door in childhood memories that goes nowhere after being pushed open. Only those who step into it in person can get a glimpse of the strange world full of weirdness and mystery. Mystery knocks on the door of reality. Under the mirror lake, undercurrents surge. The competition across multiple time and space has begun on the stage of life and death.