Being a spy isn't easy, and falling in love is not an option. Nari Young has been with the S.T.K.-Shoot To Kill-agency ever since she was a 12 year old girl who watched her parents bleed out in front of her in her own home. Ever since that day she's sworn to kill all those who have a twisted mind like the man that killed her parents. The rules are simple, 1-Always kill the target 2-Never leave a trail behind And the most important rule of all, 3-Don't have witnesses. Nari is as good as gets when it comes to being an undercover agent working for the S.T.K.. She's worked harder than any other agent in the agency to bring criminals who've walked free to justice. She has only one rule that keeps her ahead of others; never fall in love. Nari has never had a good thought towards a man since the night of her parents death but when she's assigned to the case of a criminal mastermind who's walked free from every court room trial against her, she meets Chin-sun, and she begins to feel things she's never felt for any man before. He makes her laugh, and smile like she never has before and she feels as if maybe she's falling in love, but is she willing to risk her life and the mission all for a guy?