Being a lil' sister of Kim Namjoon, the one of the world's most renowned Youtuber, to have to blend in with Bangtan Boys, his Youtuber squad, is not an easy thing. But, you're Namjoon's lil sister. The brainy genes are in your DNA, of course you do have a perfect plan for the rest of your holidays with them to be smooth. However, things don't go the way they supposed to be with the devil in an angel's disguise, or in other words, Park Jimin.