The film is a part of a series of love stories featuring Miura and Yamaguchi, who eventually married in real life.

[2] Set in 19th-century Osaka, the film tells the story of a love affair between Sasuke (Miura) and blind koto teacher Shunkin (Yamaguchi), who lost her sight at the age of nine.

Despite her blindness, Shunkin demonstrates extraordinary skill in playing traditional Japanese instruments such as the three-stringed shamisen and thirteen-stringed koto.

The film delved into the psychological study of Shunkin, and her struggles as a young woman aware of the experiences she will never have due to her blindness.

Her life takes a significant turn when she agrees to teach music to Sasuke, a young man who also serves as her student and servant.