秘密妈妈

宋允儿剧中饰演曾是医生为了专注孩子教育而成为全职主妇的金允真一角，由于丈夫的引荐相识了一位入学考试代理母，两人结下了深刻的友谊。 　　金素妍饰演神秘的考试保姆Risa金一角。她以从美国来研修的孩子们为对象，经营着一家民宿，是个给予他们温暖关怀的考试保姆。 　　金泰宇剧中饰演金允真（宋允儿饰）的老公，警察所长韩宰烈一角， 温柔，给人好感，对待犯人180度反转。 　　宋再临剧中饰演强力警察夏正完一角。 高大帅气憨厚。事事退后一步先观察，但是一旦开始做就会勇往直前义无反顾的去做。 　　该剧是讲述隐藏着孩子死亡秘密的家庭里，住进了一个神秘的考试保姆【子女就读名牌大学的父母，拿了钱受别人委托，帮忙辅导其他家庭孩子高考的人】而引发的女性悬疑惊悚剧Kim Yoon Jin was once a psychiatrist, who quit her job to care for her husband and son. She previously had a daughter who died. Yoon Jin carries a sense of guilt over her daughter's death. Moreover, she is worried about her son how is about to enter a university. She then decides to hire a mysterious expert to help her son enter a good university.