``The Call of a Sad Spirit'' is the story of Ryoko Suzuki, a female journalist who is drawn in by the sound of a mysterious cough coming from an abandoned hospital building. Ryoko becomes interested in the spirit of Haruka Izumi, who is said to have died in a hospital several decades ago, and begins to investigate the mystery of the abandoned building. While unraveling past medical mistakes and unresolved stories, Ryoko discovers the heartbreaking truth about spirits, and ultimately ends up turning into a spirit herself and staying in an abandoned building. This story is a mystery that depicts a hidden past and spiritual bonds.