《关键人物》是由朴重九导演执导的一部喜剧电影，影片讲述的是清廉刚正的新任长官一心想要打造自己的清廉政治人生，在上任之后克服种种困难反贪腐的过程，此外还将展现他在私下作为一个父亲的日常生活。 尹珍瑞在片中扮演的是被新任长官任命的辅佐官“夏英”一角。在影片中她是一个充满了激情的新生代精英辅佐官，在上班时间绝对是一个拼命工作的热血公务员，然而到了下班时间后她却成为一个徘徊在寻找幸福道路上的剩女，是一个性格十分可爱明朗的角色。
张红花的哥哥张石头因为救人而不幸溺水牺牲，她沉浸于悲痛中导致学习下降。为了照顾年迈的爷爷和失明的妹妹春妮，张红花整天利用放学时间捡破烂赚钱维持生计。谁料就在这时，张红花的爷爷查出患了肺癌，她彻底崩溃了…
An insane man first loves then grows to hate his neighbor, an old man whose penetrating gaze unnerves the insane man. He plans a perfect crime and executes it one night. The next day, two officers knock on the insane man's door, investigating a shriek heard in the night. The insane man invites them in, answers their questions, and submits to an examination of his eyes by one of the officers, who proclaims him innocent. The insane man invites them to stay and relax awhile, then regales them with his theories of crime. His heart begins to beat louder. Angles on the set are skewed to suggest the man's internal disarray.
两个兄弟和他们的家庭之间的紧张局势升级时，一个视频曝出了其中一个的儿子与另一个的女儿殴打一个无家可归的女人置其死亡。
