In the quiet wards of the aging hospital, Takumi slips into sleep and experiences vivid impressions of events long past, their presence lingering in specific rooms and hallways. These subconscious visions grow clearer as he recounts them to journalist Amano Aki, who helps connect the fragments to the building’s hidden timeline. Their joint inquiry leads them deeper into one forgotten section, where the accumulated echoes suggest a pattern behind the facility’s earlier days. As understanding forms, the pair senses that the hospital’s story may still hold answers for Takumi’s own condition.