Do Hyunsong works as Byun Baekhyun's bodyguard. As a bodyguard, she need to spend all her time with the most annoying person she ever meet. Baekhyun hate Hyunsong for control him all the time until he realized she different from others. The more they spent time together, the more close they are. Hyunsong exist become more meaningful to Baekhyun after she saved him a lot of times. One day, Baekhyun confessed to Hyunsong. She rejected him since she know something will happen if she accept it. Her thought right when Baekhyun got kidnapped. She tried her best to save him but that not that easy when the truth got revealing.