In the wake of the war, the investigator reaches Ueno to probe a disappearance from an affluent family. At the Kouzuki residence he encounters a young woman whose features echo those of a former love, and she urgently asks him to locate her vanished elder twin. Her father counters that the sister is already dead, leaving the detective to sift through conflicting accounts and lingering shadows of an infamous local case. Fiction and fact begin to intertwine as quiet tensions build toward an uncertain outcome.