The setting is "another Japan," a country split into three parts following a century of ethnic conflict. Kegare escapes after being held captive in an underground prison for ten years and befriends a girl whose father runs a business recycling artificial soldiers made from soybeans. Keeping watch over Kegare is her adult self, Misa. This empathetic symbiosis transcends time and space. As past, present, and future get jumbled up, Kegare finally confronts an unpleasant memory that she should have forgotten.