A shipwrecked Frankish cartographer named Étienne is mysteriously drawn into the center of a war-torn Eastern empire. Guided by prophecy, he must assemble a legendary suit of celestial armor known as the Azure Ghost. As he journeys through mystical landscapes and forges an unlikely alliance with a warlord's daughter, he transforms from a lost stranger into a powerful symbol. He must confront not only armies but the very nature of conflict itself to inspire a divided world to lay down its arms and embrace a lasting peace.