Jang Seul Mi is cold-hearted, anti-social girl who has no care for anything but her twin brother, Jang Geun-suk.
She meets Kim Hyun Joong, who becomes the centre of her life after her brother.
He promises to stay by her side and never to betray her.
But it seems there are a lot of people who want to split them apart.
Will Hyun Joong betray her in the end?