In a dying Britain, how far will a mother go to save her child?


It has been five years since a toxic microplastics storm killed millions and made Katie's world unrecognizable, but she is determined to create a safe place for her beloved little boy, Harry. His world is their one-bedroom flat, where Katie keeps him indoors at all costs. Even the air outside could be deadly.

And then, one day, a man stands at their door, and Katie realizes that her home isn't the place of safety she thought it was. And so she and Harry begin an impossible journey, in search of the man Katie was meant to marry. It will take them across a devastated country and through terrible danger, but hope drives them on . . .