|summary=Sally and Livvy were inseparable friends at university but being friends with Sally was like constantly living on a roller coaster. Eventually, after what Livvy felt was the ultimate betrayal, the two fell out and their friendship never really recovered. Years later, after discovering that Sally has died in a car crash, Livvy is forced to relive the past and she starts to discover what her friend was really like.
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As a woman in her mid thirties, Livvy feels that her life is OK. She has a good job even though she is slightly intimidated by her boss and is often in danger of being overlooked for new projects. Her love life might be non-existent but at least she shares her home with James, the one time love of her life which only works if she can settle for being good mates. However, when she hears that Sally, her best friend from many years ago, has been killed in a car accident, her world is turned upside down.