Your closest friend.

She saved your life. One hot, humid night in London, Cara is caught up in a wave of terror and chaos. Until a hand reaches out - and a stranger pulls her to safety. She knows your darkest secrets. Taking refuge with her unlikely rescuer, Cara shares more of herself with Amy than she ever has with anyone, including her husband. But after the hours of darkness are over, she can't remember exactly what secrets she revealed. Cara attempts to put it a...