You're the pretty, popular, rich, intelligent sweetheart of your private school. Everyone loves and adores you. You seem to live the perfect life. But what people don't know is that you’re also the secret member of Seoul's most heartless girl gang, After School. The teens of your family all belong to a gang, and it's a secret almost NO ONE knows about, not even your parents.  Your double life seems to be going perfect until two guys entered it, and refused to leave it.