KBS TV station's new insurance crime drama. Liu Zhitai, Liu Herong, Yu Zhaohuan and others co-starred, through multiple insurance fraud cases, truly reflecting the rampant insurance crime phenomenon in South Korea. Liu Zhitai plays Cui Jiangyu, an investigator known as a mad dog, who never lets go of his eyes. After losing his family in a plane crash, he began to track down insurance fraudsters. Yu Zhaohuan plays Jin Minjun, a fraudster who joins the MadDog group in order to reveal the truth about his brother's death. Liu Herong plays Zhang Heli, an eight-colored bird investigator who was a gymnast in the play. In order to repay Cui Jiangyu's kindness, he followed and joined the MadDog group. Jin Huixing plays an insurance company investigator who is proficient in computers. He is a talented and simple character. Hong Xiuxian plays an elite employee of an insurance company].