In the film, the mother of the girl and boy dies young, and the girl for sakes school to take care of the boy, much as Lin's third sister, six years his senior, didn't graduate from elementary school until she was 15 because she had to take care of him.
例如劇中姐弟的母親早逝，姊姊為照顧弟弟而耽誤了入學，而林正盛大他六歲的三姐，也因為照顧他，直到十五歲才小學畢業。