Lee Nara is an undercover cop. She's assigned to attend a high school, but not a normal high school, Cube High. The baddest school in all of Seoul, the kingkas are Seoul's baddest gang, Beast. And it's rumored that Beast is guilty of the murder of tons of people and they are rumored to be on top of the Drug trade. Lee Nara is determined to get to them and find the truth then arrest them for their crimes. 

But what happens when Nara gets close to the fighter of the gang, Yong Junhyung? And she gets too attached?

What happens when the most heartless member of Beast....falls in love with a cop.....?

....goes....down.....