In order to study the sad history of Asian women who were sold to Nanyang as prostitutes 50 years ago, Keiko Valley (Komaki Kurihara) has traveled almost everywhere in Cao Tian. But when people learned that she came for this theme, almost everyone remained silent. Just when Keiko decided to leave, she accidentally met a poor old woman, Archie (Tanaka Kinuyo).

After a short stay at her husband's house, she returned to Kyoto, and Keiko came to this remote mountain village again. Asazaki's son is far away in Tokyo and never comes to see her. She doesn't even know what her daughter-in-law looks like. Lonely Akiko is very excited about Keiko's arrival and introduces Keiko to her neighbors as a daughter-in-law.

Keiko tentatively brought up the topic of "Sister Nanyang" with Akiko. At this time, Qiu Zi always looks gloomy and doesn't want to mention the past days. Keiko knows that Akiko was once the sister of Nanyang, but that life is a painful memory for Akiko, and it is cruel to ask her to peel the scar herself.

However, by chance, Mrs. Akisaki talked about her past. When she was young, her husband's family lived in poverty. After the mother remarried, she followed the traffickers to Nanyang in order to feed her family. But she didn't know that her miserable life was about to begin. Teenage Akisaki was sold to brothel No.8 and began to be forced to take guests. Although she swore an oath, she could only bear it silently under the intimidation and inducement of her boss. In order to leave this hellhole one day earlier, young Ah Qi tried to make money to atone.

During her stay in Nanyang, a young man named Hideo Takeyama (played by Kensuke Tanaka) came into her life, which was the first time Qiuba fell in love with a man. Xiufu promised to make money to redeem Akisaki, but in the end she couldn't accept her status as a prostitute and never heard from her again. Disappointed Akisaki lived a life that was worse than death all day.

With the passage of time and the recovery of Japan's economy, the Japanese government no longer relied on selling Nanyang sisters to earn foreign exchange, and the brothel business began to decline. The brothel No.8 where Ah Qi was located changed hands several times, and was taken over by the proprietress, Ma Ju, who was also a prostitute. A Ju, a kind mother, used her life savings to build a cemetery for all Nanyang sisters in Japan. Before she died, she told everyone to spend the rest of her life here and not to go back to Japan.

However, the homesick Archie did not listen to Aju's advice and returned to his hometown. At this moment, my brother is married and has children, and the family can't melt her. The discrimination of his family and neighbors made Archie heartbroken, so he left Japan and went to the northeast of China to marry a cobbler. After Japan's defeat, Akisaki returned to his hometown, and his husband died, leaving a son. When her son grew up, he sent her back to his hometown and married her in the city, but she never appeared again.

Keiko was deeply moved by Qiu Zi's story. Before leaving, Akiko asked Keiko for her towel as a souvenir. Keiko specially came to the cemetery built by her mother Aju, where she worshipped the Nanyang sisters who had suffered a lot.