Poong Ho is a real fighter and second-in-command gangster as well as a job seeker and a household nuisance at home. He has a brother named Kang Ho who is known as a 'die-hard detective'. One day, a murder case occurs and Kang Ho is in charge of it. A suspect named Jae Hee gets in contact with Kang Ho and the two get into a real fight. However, Kang Ho is no match for Jae Hee and falls into a coma. Poong Ho wants to take revenge on Jae Hee who put his one and only brother in a coma but he knows he is not even an inch of what Jae-hee is when it comes to fighting. Poong Ho is even put on a restraining order for obsessively cornering Jae Hee as the suspect. Grinding his teeth, Poong Ho learns how to fight from Old Man Hwang to take revenge on Jae Hee. Then to draw Jae Hee's attention, he shows himself off to various online shows, SNS, and media. He uses the same way that Jae Hee used to start a fight with Kang Ho to challenge him to a fight. Will Poong Ho succeed in taking revenge?