Darkness is the only word to describe her life. Lee Areum moves to Korea in hopes of putting her past behind her, and starting fresh. She keeps a smile on her face, that even the closest people to her believe she is okay. Even though she's not. When she meets Exo, maybe she will finally realize that there is still light at the end of the tunnel. And maybe, just maybe, there is more to life than sadness, and betrayal.