金明民饰演的姜健宇，被称为Maestro姜（姜指），42岁，是一位在欧洲声名鹊起的指挥家。他虽然成就非凡，但为人毫不圆滑，尖刻毒舌、蛮横孤傲、咄咄逼人、固执己见。他要求极为严格，一旦达不到要求的演奏家，他就毫不客气地发挥毒舌功力，骂的对方体无完肤。这样的性格使和他一同 工作的人完全无法忍受，因此，他从来没在任何一家乐团做超过6个月的常任指挥，不是主动辞职，就是乐团成员受不了他而放弃。他的外号“交响乐团杀手”也由此产生。 然而，就是这样一个连顶尖乐团的优秀演奏家都深感敬畏的指挥家，却阴差阳错成为一个业余乐团的指挥，乐团由一群被音乐抛弃也抛弃了音乐的乌合之众组成，姜健宇不得不训练他们，并和他们一起走上音乐厅的舞台......
该剧以校园暴力为主题，讲述因校园暴力而站在生死边缘的儿子以及家人以儿子的名义寻找真相的故事，即便是在这个充斥着虚假、隐匿、背叛、曝光的自私的世界中，大家依然能够互相舔舐伤口，一同寻找对“美丽的世界”的希望。
此剧描述男女主角在度假胜地相遇，两人于酒醉后发生了一夜情，后来各自回到了日常生活。偶然间两人在公司里，以本部长和营养师的身份再度相逢，原本的一夜情缘，又有了延续发展的机会
When high school teacher Na Aejoon shows up for work on an ordinary day, he never expects to bump into his favorite celebrity in the hallway. But when his school becomes a filming location for a show starring Choi Siyeol, his bias from the idol group A-One, that's exactly what happens! If that's not enough to give a fanboy a heart attack, Siyeol takes an interest in Aejoon and asks him to join the show as his "co-teacher." Desperate to keep his fan life a secret, Aejoon is forced to put his acting skills to the test, and not just on camera. But as he spends more and more time with Siyeol, the deception becomes harder to keep up. Not to mention, he might not be the only one keeping secrets…
该剧描写现实的刑警世界，讲述追踪真相的人们和试图隐藏真相的人们的对决。
