The Tokugawa eastern army won the decisive Battle of Sekigahara. However, the father of farmer Daisuke was mistaken for a Toyotomi remnant and killed by Arashida Shujinmasa. Daisuke vowed to avenge his father's death, but when he met Shujinmasa by chance, he was not taken seriously and was knocked unconscious by a horse's hoof. Rescued by Yagyu Munenori, Daisuke enrolled at the Yagyu Dojo and honed his sword skills, but... will Daisuke be able to avenge his father's death?