1939 - American heiress Vivi Miles falls for naval officer Nathan as soon as she arrives in England. And, under the threat of war, they marry in a whirlwind before he leaves to join his ship.

When Nathan returns from Dunkirk injured, he is distant, aloof, and no longer the man Vivi fell in love with. But it's not just because of his brutal experiences of war. Nathan has a secret and Vivi suspects it's linked to the mysterious evacuee at the secluded house in the woods on his Kent estate.

As war continues to rage, Vivi battles her own grief and loneliness, and tries to find out the truth of the girl's identity, uncovering a scandal from the past.

Is her love for Nathan strong enough to survive?