Y/n is known by her code name black rose who is extremely cold hearted and murderous, always finds and kills her assignments with no remorse for she has a goal on mind. 10 years ago y/n watched as her whole family was brutally murdered in front of her eyes and ever since she has been searching for answers and revenge. Only trusting her team of friends who she works with what will happen when another agent called jungkook is assigned to her team with a terrifying past of his own. Will everything end smoothly or will all hell break loose when they come face to face with one another.