The Unabara Domain is home to nightmarishly powerful students and masters of various martial arts. The lord of Unabara has decreed that whichever of his sons identifies the strongest martial arts style will become his heir. However, when the 28th son, Naoyoshi Washizu, chooses Gama Kurogane—an practitioner of the Ogama style, son of a notorious father and heir to a "weak" style—to represent him, the odds appear bleak. Yet, through Naoyoshi's determination and Gama's hard-earned strength, they may still emerge victorious.