"Not just a flavour, but a way of life." When seventeen-year-old Flo Kennedy is forced to up sticks and trade her life in London for a sleepy seaside town on the south coast, she's anything but excited. Walden-on-Sea could win awards for being Britain's dullest town, and with a population consisting almost entirely of over sixties, teenagers are an endangered species. Silently struggling with her parents' death and separation from her sister, Flo's convinced she's in for the worst summer of her life. But when she meets the guy in the ice cream shop, things start to change. It's not long before she lands herself a job, a new set of friends and maybe even the beginnings of first romance. For the first time in several years, she's happy. But Flo knows all too well that things can't stay perfect forever, and after all, being on top of the world only gives you further to fall.

Hadley Jamison doesn't know what to think when she hears that her classmate, Archer Morales, committed suicide. She didn't exactly know him, but that doesn't stop her from feeling like there was something she could have done to help him. So to Hadley's surprise, on the very night of Archer's funeral, she has a run in with Death himself and is offered the chance to go back in time to stop Archer from ending his life. The catch? She only has twenty-seven days to do it. And if Hadley doesn't succeed? Well, she doesn't want to think about that.