这部剧讲的是一个跨越200年，男主角为了守护女主角不惜挑战危险的命运的故事。
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…
本季故事发生在首季的78年后。首尔，2024年。尹采玉（韩韶禧 饰）遇见长相酷似张泰尚的张浩载（朴叙俊 饰），悬而未决的谜团揭晓，命运又会如何捉弄两人？
讲述了韩国职场人士的现实，引起大众的共鸣。
由于总统在缅甸遭受恐怖袭击，所以国防部决定对朝鲜进行报复行动，该行动由国防部长崔英灿主导，但21名特种部队成员完成任务后却遭灭口，在好友朴武烈保护下，李震彪（金相中 饰）成了唯一的幸存者。面对国家背叛，他决定复仇。他抢走了朴武烈的独子潜逃至泰国，抚养他长大。28年后，从美国MIT学成归来的李润成（李民浩 饰），带着义父复仇的旨意回到韩国。为了掩人耳目，他的身份是青瓦台国家通信网特聘专家，阴错阳差结识了青瓦台警卫员金娜娜（朴敏英 饰），后者身世凄惨，但颇为坚强，相似的命运让两人发生了一段生死之恋。李润成在复仇时用了“城市猎人”的代号，成为首尔检察官金英株（李俊赫 饰）一直追逐的目标。在一个个消灭主谋的同时，真相正在浮出水面……
