The world is coming to an end. Dragged from her bed in the middle of the night and forced to leave her beloved puppy behind, Natasha has no idea if she'll ever return home. 

Growing up in the shadow of the ruined nuclear power plant, pups Misha and Bratan need to learn how to live wild - and fast. Creatures with sharp teeth, scythe-like claws and yellow eyes lurk in the overgrown woods. And they're watching the brothers…

But will the dogs survive without humans? And can humans live without them?

A devastating tale of courage, companionship and hope from the Carnegie award-winning author of Lark.