Mi-sun and Do-kyung might be used to struggling in the most dangerous part of Seoul's Gangnam district, but that doesn't mean they've settled into it. With no one but each other to rely on, the two friends grind away to save the money needed to leave their dangerous lifestyles behind. But just as "retirement" comes within reach, the world betrays them, shattering their hopes. On the edge of a dead end, they discover a hidden fortune of dirty cash and gold in Gangnam – and place all their bets on one final high-stakes gamble of a lifetime.

Jang Se-chool is the boss of a gang. He has been in love with Kang So-hyun for the past 3 years, even though she constantly rejects him and tries to push him away. Having had enough, she tells him that she can't be with him because she wants to be the first lady of Korea.

The strongest punk detective in the police station who investigates with his mouth more than theory, 'Dong-min', is appointed to the investigation department just when he was about to become successful in his career. He is sad to be appointed, however, he will be having a joint investigation with a straightforward FM detective 'Mong-heo', in charge of a case that involves a missing model. As the investigation progresses, 'Dong-min's instincts awaken and realizes that it was not just a case of a missing person. It couldn't get any better! A comical, slapstick combo investigation begins!