《玉贞姐姐》是一部优秀的剧情片，主要演员有朴艺荣,李夏恩,金伊敬,朴钟焕,韩海印 Yujeong, who works as a night shift nurse at a general hospital's cardiology department, is now told that her 12th-grade younger sister, Kijeong, has been arrested by the police as a suspect in an infant abandonment case. Only then does Yujeong start to make desperate efforts to rescue her sister.