Sasaki Kojiro, renowned for his deadly "swallow-cut," is the man destined to be sword-saint Miyamoto Musashi's greatest rival and opponent in the most well-known duel in the annals Japanese history. In the aftermath of the Battle of Sekigahara, Kojiro comes face to face with emotions previously unknown to him—fear and desperation. Far from being daunted, Kojiro embraces these feelings and allows them to shape him into what may be the ultimate swordsman.