Who are “Dochu-shi?” They are street thieves. Ankuro’s blissful holiday with his parents is shattered when a group of thieves frame his father for theft and violently take his mother’s life. Fueled by grief and a thirst for justice, Ankuro vows to become a thief himself and challenge his parents’ killers to a match of thievery skills someday. 15 years later, having mastered his skills under the training of Oshin, his adoptive mother, he prepares to face his enemies in a series of matches adhering to the Dochu-shi’s code.

"道中師"として活躍する男性・暗九郎は幼い頃、道中師の集団に父親を殺され、さらにレイプされた母親が自殺したせいで天涯孤独となったという身の上。だが、女性道中師のお新によって拾われ、凄腕の道中師に育てられた。以後両親の仇討ちを考えない日は一日もなかった暗九郎だが、ついに15年後の現在、両親を襲った道中師の集団と再会することに。手ごわい敵どもとの決戦だが、暗九郎は決死の覚悟をもってそれに臨み……。