此剧是刻画死守犯罪现场黄金时刻的112举报中心队员们的激烈记录故事。男女主角是在大韩民国最落后的地区112举报中心工作，为了追踪杀害他们家人的连锁杀人犯，认识到死守在犯罪现场里的黄金时刻的重要性，从而成为真正的112举报中心队员以及警察的故事。
金仁河（李秉宪 饰）从小就过着漂泊不定朝不保夕的动荡生活，他所结识的朋友，不是社会地位底下的小混混就是为人所不齿的卖身女，然而，金仁河本性善良又讲义气，深得朋友们的喜爱和信赖。一场意外中，金仁河锒铛入狱，在狱中，他不改本性，又结交了一群生死相依的朋友们。 出狱后，想要金盆洗手的金仁河却被迫重新坐上的赌桌，尽管赢得了赌局，却也弄得身败名裂，不得不隐姓埋名，东躲西藏。之后，金仁河被黑手党老大看重，加入了黑道，过了一段腥风血雨的日子。离开了黑道，金仁河重新回到了赌坛，这一次，他潜心深造，闭关修炼，终于成为了一代赌圣，而他和青梅竹马秀娟（宋慧乔 饰）之间的恋情，亦在风雨飘摇之中修成了正果。
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…
