In 16th century Japan, peasants Genjuro and Tobei sell their earthenware pots to a group of soldiers in a nearby village, in defiance of a local sage's warning against seeking to profit from warfare. Genjuro's pursuit of both riches and the mysterious Lady Wakasa, as well as Tobei's desire to become a samurai, run the risk of destroying both themselves and their wives, Miyagi and Ohama.
In 1701, Lord Takuminokami Asano has a feud with Lord Kira and he tries to kill Kira in the corridors of the Shogun's palace. The Shogun sentences Lord Asano to commit suppuku and deprives the palace and lands from his clan, but does not punish Lord Kira. Lord Asano's vassals leave the land and his samurais become ronin and want to seek revenge against the dishonor of their Lord. But their leader Kuranosuke Oishi asks the Shogun to restore the Asano clan with his brother Daigaku Asano. One year later, the Shogun refuses his request and Oishi and forty-six ronin revenge their Lord.
Shinnosuke is introduced to Shizu as a prospective marriage partner, but he falls in love with her widowed sister Oyu. Convention forbids Oyu to marry because she has to raise her son as the head of her husband's family. Oyu convinces Shinnosuke and Shizu to marry so that she can remain close to Shinnosuke.
