When the owner of a shabby, soon-to-be-demolished villa in a run-down part of Seoul mysteriously dies, it sets in motion a chain of events that touches many lives. His son Oh Bok-gyu (Shin Ha-kyun), a struggling actor who was previously completely unaware of his inheritance, arrives to take possession of Apartment Number 201, only to find that rumors are swirling everywhere that his father has left a huge fortune of ₩50 billion in gold bars hidden somewhere in the villa — and that his father was murdered. As Bok-gyu navigates his way through the web of mystery surrounding his father's death, he encounters intrusive neighbors, oddball residents, a hardcore gangster and a beautiful girl — any of whom may have their eyes set on his money. When he meets orphaned, lovely Yoon Seo-rin (Lee Bo-young), he thinks that she's the girl of his dreams, but is unsure whether to trust her