A girl having terminal cancer wants to visit her old secondary school one last time. Together with her friend, a quiet one with long hair, they talk much about the meaning of life before arrive at the school. This school still look the same, the night is near and her health is deteriorating. But she still wants to enter. The center of school yard is a place where many people die, it's bad luck to stand right onto it. And it is the place that she die.

What weird is she finds herself back before that happen, and the entire school is locked out of existence. People are trapped inside, and must navigate the danger of this cosmic unknown in order to find the way out.

But is the way out important, when you see the horrible truth of the unknown?

Each character has their own power, desire, what they hold dear the most. But what will you do, when you realize the most important thing in your life, is meaningless?