In 16th century Japan, a fearsome feudal lord finds himself in a critical situation after being wounded in battle. To protect his empire and maintain peace in wartime, his most loyal advisor decides to employ a risky strategy: recruit a peasant who resembles the lord to assume his identity. This double, a man from the lower class, suddenly finds himself in a world where honor, strategy, and violence are the norm. At first, his life as a "substitute" unfolds in a climate of adrenaline and excitement, enjoying luxuries he never thought he would experience. However, the weight of expectations and the difficult task of maintaining appearances will weigh heavily on his shoulders.
As the conflict intensifies, the peasant is forced to confront not only physical battles but also the moral dilemmas that arise from lying about his identity. The loyalty of his allies is put to the test, and he finds himself increasingly trapped between the life he has assumed and his true self. In a world where the symbols of power are as fragile as honor, the line between hero and traitor blurs, leading the audience to a profound reflection on identity, war, and the sacrifices made in the name of leadership. With tense situations and surprising revelations, the story culminates in a shocking conclusion that will leave no one indifferent.