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This humanistic drama is set on Okin-shima, a remote island off southwestern Japan. Here civilization has yet to intrude, and when a nurse comes to live there, the people are suspicious. Eventually they come to accept her. When the locals mysteriously begin falling ill, she calls in a handsome doctor who discovers the disease is caused by a parasite and ends up falling for the nurse. He proposes to her; she accepts, but just as they make ready to leave, the nurse suddenly changes her mind because she knows that her real destiny is to continue working on Okino-shima.