This Japanese action-adventure is set in the 17th century when all forms of swordplay were banned. One fighter, an excellent swordsman believes the law is unfair. His brother keeps his opinions about the law to himself. The swordsman vents his frustration by cutting off the thumbs of an enemy. The fighter is then banished. To live, he becomes a thief. To restore the family's lost honor, the other brother is forced to challenge the fighter to a duel.