All it takes to change your life is a single moment. A random stabbing on a London bus leaves a young woman widowed and detached from her previous world. Stripped of a future that should have been hers, she impulsively books a trip to Prague – the city where she and her husband got engaged. But in the midst of a bleak winter, isolated and numb, she can do little more than wander the cobbled streets – until she receives an intriguing proposition. There’s a job for someone just like her. All she needs to do is pick something up, and drive back. Just once. Only ever once. Stylish and daring, this high-stakes thriller explores what happens when a curve ball skews life out of all recognition.