Stella won't give up, but she doesn't know how to go on. Stella North, a rising star in the police, has her life torn apart by a gunman's bullets. She has often faced danger, but these injuries mean she must give up the job she loves. Her grandmother Beth is her rock. And Beth is no ordinary woman. At seventy, she runs marathons and has a past that Stella knows very little about. Beth calls in her friend Michael to help with Stella's recovery. But this man means a lot more to Beth than she reveals. And Stella's ex-husband Edward and old police partner Robbie want to help, but Stella puts up emotional barriers, and they have problems of their own. Her old friends from her days of Urbex (exploring old abandoned buildings) offer a glimmer of hope for the future.