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Set within a village on the Gangwon-do Mountain, Hae Won has lived alone with her mentally ill father since she was 10 years old. Her mother left them at that time. Hae Won has a secret. Yoon Soo blames himself for his friend's suicide. His parents decide to send him to a small and peaceful school located in Gangwon-do. At his new school, he meets Hae Won, who seems to have a strange mood. Yoon Soo falls in love with her.