What happens when the one that got away comes back? Find out in this sparkling debut from Mhairi McFarlane. 'Think of the great duos of history. We're just like them.' 'You mean like Kylie and Jason? Torvill and Dean? Sonny and Cher?' 'I think you've missed the point, Rachel.' Rachel and Ben. Ben and Rachel. It was them against the world. Until it all fell apart...