A struggling restaurant owner, caring for his sick mom, finds a bag of cash in a sauna locker, while a customs officer gets into trouble when his girlfriend runs off with money he borrowed from a loan shark.
In a DVD-themed sex hotel, a young employee has hidden drugs in room #7 for criminals in exchange for wiping off his debt. But then his boss hides a dead body in the same room and locks the door. And a dangerous battle of wits ensues between a man who must lock away the secret behind the door, and another, who must go inside.
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.
