jaehyun is an secret agent from FBI undercover. He is cold, indiferent, and cruel to his enemy, but not for his wife. He has been married on 3 years ago and jaehyun has been hiding his true profession from his wife all this time so that she doesn't get into danger because his job is dangerous. Even though they are married, she doesn't know his real job and what she know is that he is an office employee and he always lied about it. One night, the head office informed jaehyun about the latest case of a fugitive on the loose. When she want to sleep, she see him pick up the phone and then rush out of the house.