After three weeks of travel through a demon-haunted land, the children of Nagakushi village have come further than either of them imagined possible when they first walked out of the mountains. The western capital — seat of the dragon's power — is within reach at last. Every step toward it has peeled away the comforting fiction that this was simply a rescue mission for two stolen souls. The oni serve a master with a longer design, and the children's very existence is bound up in it. As the final chapter of BS Shin Onigashima unfolds, the truth behind their origins comes to light: who they truly are, where they came from, and why the dragon moved against their family in the first place. The confrontation is not only a fight to free two old farmers — it is the culmination of a secret neither child suspected when they left home.