Jooheon's parents, who are very important people with a reputation they need to protect, are keeping big family secrets. Those secrets drive them as far as having to hire a bodyguard called Wonho for a month to have an eye on Jooheon and keep him safe from things no one knows about. How bad is the situation Wonho was dragged into? How will both master what's waiting for them? How many secrets will they be able to find out about in only a month? And how are they going to do all of that without ... falling in love?