Yu Na, who used to be part of the dark world as a thief, sometimes goes back to her old habits. When she moves into a multiplex house, she meets a group of old gangsters with dark pasts. Han, the owner of the place, used to be a gang boss but has started a new life as a good citizen. All sorts of people live together - a member of Korea’s first generation mafia, a corrupt former policeman, and a charged adulterer. While they have been living aimless lives, a sweet and innocent guy named Chang Man shows up and changes their worldview. At first, they thought Chang Man’s pure innocence was stupid. However, he soon becomes the most important person in their lives. In the meantime, Yu Na feels love for the first time while quarreling with Chang Man. What will become of their dramatic love for one another?