Koshiro Matsudaira lives in Tanjousan Bun in Echigo as a commoner and surrounded by people that love him, including his father Sakubei, who works for the Tanjousan Bun. One day, many officials working for Tanjousan Bun come to Koshiro's house and Sakubei tells his son the shocking truth about his birth. Koshiro learns that he is the son of Daimyo Ikkosai of the Tanjousan Bun. Even more shocking to Koshiro, is that Daimyo Ikkosai has suddenly handed over his feudal lord position to Koshiro and has gone into retirement. Koshiro thinks that he has come across good fortune, but he soon learns that the Tanjousan Bun has a huge debt that needs to be payed off soon. 平民鱼贩小四郎突然被告知真实身份并继承了大名之位，本以为是个丑小鸭变天鹅的美好童话，却发现自己的领地欠下相当于现在约100亿日元的巨债，而背后更有着惊天阴谋。本片改编自日本当代文豪浅田次郎的同名时代小说，汇聚了神木隆之介、宫崎葵、松山研一、浅野忠信等全明星阵容，音乐鬼才大友良英操刀配乐，以无论哪个时代都与人息息相关的“钱”为主题，为观众带来一出轻松搞笑又温暖励志的人生逆转大戏。
