I could not retrieve a full plot summary of the film's last act, so this section covers only what the sources support and my general reading. The film follows Hye-won through a full year, with winter returning at the end. The sources state that "only for a few days" turns into a full cycle of seasons, and that she builds a self-sufficient life while she thinks about her mother, who left her suddenly.
The central point is that the film's hidden structure is the mother. Hye-won's cooking, her sense of leaving and her question about whether her mother found answers all point to her. By the end Hye-won has stopped running from her failures. She has learned from the cycle of seasons that growth takes patience and that she can choose what she wants.