Juzaburo, known as a chivalrous robber, is one day betrayed by his henchman and his entire gang is slaughtered. The gravely wounded Juzuaburo escapes and is saved by Inspector Sadaemon and a couple, Kansuke and Okayo, who run a tavern. There, Juzuaburo retires and changes his name to Genzaburo.

江戶時代，盜賊首領十三郎（古田新太 飾）遭到心腹背叛，導致整個黨被覆滅。身負重傷的他幸運逃脫後，被一對經營小酒館的夫婦-勘助與加代（稻森泉 飾）所救。十三郎康復後決定退隱江湖，做小生意直到終老，並改名為源三郎。 七年風平浪靜的日子過去，勘助因病逝世，源三郎幫助加代繼續經營繁榮的酒館。某天，一位小橋大人（大東駿介 飾）找上門，詢問當地土匪火繩砂吉（橋本潤 飾）的蹤跡。源三郎發現小橋大人是自己多年前救命恩人的兒子，於是便開始構想一個報恩的計劃，但卻不知道未來會如何發展...