尚贤（宋康昊 饰）经营洗衣店，可惜生意淡静更负债累累。好兄弟东洙（姜栋元 饰）本身是孤儿，为“婴儿暂存箱”机构工作。在一个雨夜，他们竟秘密带走其中一个箱里的男婴。翌日，年轻的母亲素英（李知恩 饰）却找上门要求领回自己的孩子雨盛！本想报警揭发，但素英最终竟同意让两个“中间人”为儿子寻觅更好的父母，并决定跟随两人同行。另一边厢，刑警秀珍（裴斗娜 饰）联同后辈李刑警（李珠英 饰）原来一直跟踪着他们，暗中收集证据，决心拉人定案！剧情由暂存箱里的婴儿引发，牵连周遭5个关键人物，展开一段意想不到的独特旅程，触动最微妙的世故人情。

　　A once promising baseball star is constantly hunted by two hitmen when a young boy asks him to sell his baseball jacket. A high school student acquires a sleep control device to help him with his exams, and ends up getting more acquainted with the seller in the process. A prison guard buys a guitar and plays one last song with a rock band after he finds out that his number has been called up… to be an executioner. An English tutor and amateur journalist investigating a murder case makes an offer to gain information on the involvement of … a once promising baseball star.
　　GOOD DEAL is a woven tapestry of the interconnected lives of people striving through the day-to-day of contemporary Korean society. Quite a spectrum of themes are covered: romance, crime, sports, famly, work, and even Russian literature! As each of its characters seek to make a “deal” with another person to help them stay ahead or even stay alive, they find their interactions much more involved and complex than they first thought. Written and directed by Cho Kyuong-ho, the film mixes wickedly dark humor and sincere sentimentality through its interwoven yet still seamlessly linear style of storytelling.

　　该片讲述是昔日赫赫有名的组织大哥“昊圣”在聚集了所有人脉的父亲的葬礼上，为了捞一把而卷入无法收拾的事件的故事。

该片改编自同名小说，素材取自于2011年发生的加湿器杀菌剂事件，通过这个事件来讲述有些事情必须有人去做，还没有结束的我们所有人的故事。
金相庆饰演因不明的肺部疾病而失去了妻子，儿子的生命也受到威胁的外科医生“郑泰浩”，徐英姬饰演他的妻子“韩吉珠”，李先彬饰演曾经在地方检察院担任检察官，但因为姐姐吉珠的死亡成为律师的“韩英珠”，尹京浩饰演加湿器杀菌剂制药公司的科长“徐宇植”。

在山区调查一起谋杀案的海俊（朴海日 饰）遇到了死者的妻子徐来（汤唯 饰）。“我担心他没有从山上回来，以为他最终可能会死。”徐来对丈夫的死没有表现出任何激动的迹象，并且她的行为与悲伤的亲戚大相径庭，警方认为她就是嫌疑人。当海俊审问和监视徐来时，他意识到他正在逐渐对她产生兴趣。与此同时，尽管被指控犯罪，但徐来开始对海俊采取大胆的行动。一个隐瞒真相的嫌疑人。同时想要怀疑嫌疑人的侦探。他们有了分手的决定。