KBS电视台保险犯罪题材新剧。刘智泰、柳和荣、禹棹奂等共同主演,透过多个保险诈骗案,真实反应韩国猖獗的保险犯罪现象。刘智泰在剧中饰演盯上就绝不松手,被称为疯狗的调查员崔江宇。在飞机失事失去家人后,开始执著追踪保险诈骗犯。禹棹奂则饰演为了揭露哥哥死亡的真相,加入Mad Dog组的诈骗犯金民俊。而柳和荣在剧中饰演体操运动员出身的八色鸟调查员张河莉,为了报答崔江宇的恩情,跟著加入了Mad Dog组 。金彗星饰演精通计算机的保险公司调查员,是一个天资聪明而单纯的人物 。洪秀贤饰演一名保险公司精英职员] 。Choi Kang-woo, a former police and leader of Taeyang Insurance's investigators team, decides to create his own investigation team, after an airplane crash that took the life of his wife and son. He then meet Kim Min-joon, a genius former swindler whose brother was also a victim of the crash, thus begin their rivalry and cooperation.