After a serious accident leaves him recovering in an aging Western-style hospital, Takumi begins to perceive strange echoes of bygone events lingering in its corridors. These visions intensify during his sleep, allowing him glimpses into others' thoughts and hidden histories. When journalist Amano Aki arrives to probe the facility's enigmatic background, the two form an alliance to explore its secrets. Their first steps reveal unsettling connections between the present and the hospital's shadowed past.