A happy marriage. A beautiful family. A lovely home. So what makes Emily Coleman get up one morning and walk right out of her life? Emily now has become Cat, working at a hip advertising agency in London and living on the edge with her inseparable new friend, Angel. Cat has buried any trace of her old self so well, no one knows how to find her. But she can't bury the past --- or her own memories. And soon, she’ll have to face the truth of what she's done --- a shocking revelation that may push her one step too far.