Blythe Hallowell is sixteen when she is abducted by a survivalist and locked away in an abandoned missile silo in Eudora, Kansas. At first, she focuses frantically on finding a way out, until the harrowing truth of her new existence settles in – the crushing loneliness, the terrifying madness of a captor who believes he is saving her from the end of the world, and the persistent temptation to give up. But nothing prepares Blythe for the burden of raising a child in confinement.