'Today is the first day of the rest of your life' is the motto on a plate in the kitchen at home, and Tess can't get it out of her head, even though she's in Florence for a final, idyllic holiday before university. Her life is about to change forever – but not in the way she expects. Gus and his parents are also on holiday in Florence. Their lives have already changed suddenly and dramatically. Gus tries to be a dutiful son, but longs to escape and discover what sort of person he is going to be. For one day, the paths of an 18-year-old girl and boy crisscross before they each return to England. Over the course of the next 16 years, life and love will offer them very different challenges. Separated by distance and fate, there's no way the two of them are ever going to meet each other properly ... or is there?