People say first love never dies. But what if you have a very painful memory of your first love? Will you still feel the same way upon seeing her after six years especially now that you're engaged to someone else?

With his family threatened by the mafia, So Yi Jung is forced to be a 'hired killer' of one of the most notorious mafia groups in South Korea. His first mission? The congressman's only daughter: Chu Ga Eul.

In writing, two tools are needed- a pen and paper. One can't write without the other. Just like in love, one can't fall without the other.

They live right next to each other. Things have started not so well for them. But will pretension bring them closer?