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…
他们是一群比坏家伙们更坏的人，然而就是这样一群人，却用专属于他们自己的手段为社会除暴安良。
韩世主（刘亚仁 饰）是一名曾经红极一时的作家，可是，在最初的辉煌过后，他陷入了事业的低谷之中。不仅如此，韩世主的身边还发生了种种令他百思不得其解的奇怪事件，这些事件和他的事业滑铁卢有着千丝万缕的关联。 让韩世主没有想到的是，一本署有自己名字的书出版上市，获得了火热的反响 ，然而他作为名义上的作者，却对这本书一无所知。经过缜密的调查，一位名叫刘真吾（高庚杓 饰）的影子写手浮出了水面，更令人震惊的是，刘真吾竟然是一个幽灵。原来，一切都要从韩世主所拥有的古董打字机说起，这台拥有着神秘过去的打字机，亦将韩世主的粉丝田雪（林秀晶 饰）卷入了一场跨越了一个世纪的旷世奇缘之中。
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