20-year-old Chieko is the daughter of Kyoto-based kimono designer Takichiro. She doubts her parents' story that they stole her as a child and raised her as their own, convinced that she is an orphan. In Kitayama, she meets a young labourer woman, Naeko, who looks exactly like her. Chieko learns that they are twin sisters, and that their natural parents died long ago after abandoning Chieko. Hideo, the son of weaver Sosuke, a business associate of Takichiro, mistakes Naeko for Chieko and pleads with her to allow him to design an exclusive obi for her. Chieko clarifies Hideo's mistake and asks him to make obis for both her and her sister. Although Chieko's parents offer to accept Naeko as their second daughter, Naeko returns to her home village after spending one night at her twin sister's home. While Chieko plans to take over her father's business with the help of her future husband Ryusuke, Naeko considers marrying Hideo, even when she knows that for Hideo she is mainly a surrogate for Chieko.
