Sana Oriya, an architecture student at university, was troubled by ghosts she could see ever since an accident in her childhood. One day, she attended a special lecture by Satoru Amagi, an architect she admired, but even there she saw ghosts. Disappointed that she couldn't concentrate on the lecture she had been looking forward to, she approached Amagi after class. He made an unexpected proposal...An occult mystery unfolds, exploring the psychological scars left behind in accident-prone properties.