The book focused on the "karayuki-san", the Japanese term for young women who were forced to work into prostitution in Pacific Rim countries and colonies during the early 20th century.
Buku tersebut berkisah tentang "karayuki-san," istilah Jepang untuk wanita muda yang dipaksa bekerja dalam pelacuran di negara-negara dan koloni-koloni sekitaran Pasifik pada awal abad ke-20.