You {Lee Hyemi} were hired to work as a personal assistant for the CEO’s son name Kim SungKyu. You worked hard for your job but you also work at a night club since you get off work early. Kim SungKyu was a stubborn guy but he was a hardworking man. He has a fiancée name Kang Yoo Jin, who was his high school lover and everyone envy them. What happens when Sungkyu started to be concern about you? You wanted to stay away; you succeed but he would find you. What would you do? What if your ex-boyfriend is back? Will you return to your old lover or someone who is engaged?