In this world life does not come easily, Jeon Jungkook knows that exceptionally well. The path of living seems dark and lonely for some, but how can there be darkness without the slightest bit of light? Negatives without a positive? Hate without love? It is simply impossible. When you're about to give up there is always something to pull you back again, in this case it is a 'Lost Star'​.  

A bad girl (RedVelvet-Irene) lives in the darkest gangster hood of Seoul attends the new highschool, wanting to be different from her family. But what happens when The popular boys Key and Kim Taehyung find a loaded handgun in her school bag? Will her scandulous past be reveale