During the war, three students bravely volunteered to prevent a terrorist bombing . After the war, it became taboo to speak of their actions, but the unveiling of a bronze statue is held to praise the three young heroes. The sponsor is Hakurou Shimada, the leader of the "Rising Sun Party", a political organization the three students had been involved in. But then, during the ceremony, two corpses are discovered inside a hidden cavity in the statue. Shinjurou had been invited to the unveiling, so with two murder victims right in front of him, he gets caught up in the puzzling case.