Akira and Ayumi try to escape from the abandoned hospital. With a powerful clue in hand, he hopes for it and begins to move. A mysterious existence that awaits you ahead of you based on clues. Akira is convinced that the existence of the mystery itself is something that leads to escape. A mysterious existence that gradually heads somewhere as if leading the two. They were chasing after that with hope, but they were hit by an unexpected situation on the way ...