A samurai returns to his homeland after a three year absence and finds his fiance is now one of the prince's concubines.

Kenji and Chuko travel to Hokkaido as migrant workers and enlist as miners under the strict leadership of Guzuyasu. On the boat journey to Hokkaido, Kenji attracts Ohama, who is travelling to Hokkaido to open a bar. When Kenji visits the bar, he chases away a sailor who was hassling a shy girl, Ofuji, which makes Ohama jealous.

After falling in love with a courtesan, Rikiya is blinded by ash during a fight in a brothel. Believing the blindness permanent and his opponent dead, Rikiya goes back home to his sister. Okiku, desperate to protect her brother who thinks himself a murderer, wants to sacrifice herself for him and become a prostitute to pay for Rikiya's treatment.