The Bank of Korea was robbed of 5 billion yuan by a gang of five fraudsters, but one person was killed and one was arrested on the spot. Detective Kim (Qian Haozhen) is in charge of the case, he quickly launched the investigation and pursuit of the other three, and the case gradually surfaced. Cai Chang-hyuk (Park Xinyang), who has just been released from prison, plans to use bank checks to withdraw huge amounts of money from South Korean banks, so he finds the veteran fraudster Mr. Kim (Bai Yun-sik). Four years ago, Mr. Kim used a plan to ruin two teachers. Mr. Kim, who did not want to do it easily, was moved by Chang Hyuk's plan to find his old partner fraudster "big mouth" and violent "swallow". As well as the expert "gasoline" who forged bills, the five-member gang was officially formed. Mr. Kim's mistress Xu Renjing (Lian Jingya) has been in love with Chang he for a long time, and the two are ambiguous under Mr. Jin's nose. After Chang he died at the crime scene, Xu Renjing moved into the bookstore of Chang he's younger brother, Chang Hu, and did not know what he intended to do. And the reason why the robbery failed, the secret behind it is shocking.