David Henry is forced by a blizzard to deliver his own twins. His son, born first, is perfectly healthy. Yet when his daughter is born, he sees immediately that she has Down's Syndrome. Rationalizing it as a need to protect Norah, his wife, he makes a split-second decision that will alter all of their lives forever. He asks his nurse to take the baby away to an institution and never to reveal the secret. But Caroline, the nurse, cannot leave the infant. Instead, she disappears into another city to raise the child herself. So begins this story that unfolds over a quarter of a century - in which these two families, ignorant of each other, are yet bound by the fateful decision made that long-ago winter night. Norah Henry, who knows only that her daughter died at birth, remains inconsolable; her grief weighs heavily on their marriage. And Paul, their son, raises himself as best he can, in a house grown cold with mourning. Meanwhile, Phoebe, the lost daughter, grows from a sunny child to a vibrant young woman whose mother loves her as fiercely as if she were her own.

    But chasing her wayward sister, Ellie, to Nazi-occupied Paris was never supposed to be one of them. Now accustomed to the luxurious lifestyle that her Nazi boyfriend provides, Ellie has no intention of going back to the shackled life their parents dictate for them—but Kat will stop at nothing to bring her sister home.Arrested for simply trying to defend himself against a drunken bully, Barrett Anderson is given the option of going to jail or serving out his sentence by training Resistance fighters in Paris. A bar owner serves as the perfect disguise to entertain Nazis at night while training fighters right below their jackboots during the day. Being assigned to watch over two English debutantes is the last thing he needs, but a payout from their father is too tempting to resist. Can Barrett and Kat trust each other long enough to survive, or will their hearts prove more traitorous than the dangers waiting around the corner?