剧中主角金科长由苏志燮饰演。在剧中，金科长是敏智的父亲，也是一名朝鲜间谍。他被派去执行无数特别任务，包括17次朝鲜任务、五次韩国双重间谍任务，以及一次针对朝鲜最高司令官的暗杀行动。他是朝鲜黑名单上的头号人物，如同一颗定时炸弹，其存在必须对韩国保密。同时他还是一位单身父亲，带着一个女儿，在韩国一家小型储蓄银行有一份稳定的工作，过着平凡的生活。
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 ...
每个人至少都曾有过一次这样的想象。“如果能回到过去的话？” 知名插画家惠成（禹知汉饰）受朋友泰俊之托，回到母校星真高中进行特别讲座。休息时间，惠成来到美术室，发现了自己旧时的速写本，并看到了里面一张被...
