Alright, in every town, every city, there will always be a family on the search for babysitters. Well.. it happens that in Seoul, there's a pretty wealthy family that has ten children. Yep, you didn't hear me wrong. Ten. You're probably thinking how the hell the mother gave birth to ten children? Although, some of the nine children are adopted, it's still possible somewhere in the world. Anyway, so the parents were going off to an emergency situation in Paris and has decided to hire a babysitter. Just one thing, the parents - Hyoyeon and Eunhyuk never agree with each other. Eunhyuk wants to hire his cousin, Lee Joon while Hyoyeon wants to hire her best friend, Jessica. After much arguing and fighting, they decided on the both of them. 

There! Great idea right?

Probably... Not so.