It's April 1861, and the Union Army's Medical Department is a disaster, completely unprepared for the magnitude of war. A small group of New York City women, including 28-year-old Charlotte Waverly, decide to do something about it, and end up changing the course of the war, despite criticism, ridicule, and social ostracism. Charlotte leaves a life of privilege, wealth, and confining expectations to be one of the first female nurses for the Union Army. She quickly discovers that she's fighting more than just the Rebellion by working in the hospitals.

New York, 1898. The only thing more shocking than Arthur Stanhope III’s unexpected death is the revelation that his will bestows his company—and most of the vast fortune that goes with it—to the nearest male heir, leaving his mother, wife, and daughter nearly impoverished. His widow, Sylvia, quickly realizes she must set aside her grief to ensure their daughter, Adelaide, is launched into society as soon as the appropriate mourning period passes.

Patrick O'Neill survived a hardscrabble youth to become a lawyer for the downtrodden Irish immigrants in his community. He's proud of his work, even though he struggles to afford his ramshackle law office. All that changes when he accepts a case that is sure to emphasize the Blackstones' legacy of greed and corruption by resurrecting a 30-year-old mystery. Little does Patrick suspect that the Blackstones will launch their most sympathetic family member to derail him. 

After all that Grandfather has sacrificed to raise her, Theresa Plane owes it to him to save the family name - and that means clearing their debt with creditors before she marries Edward Greystone. But when one of the creditors' threats leads her to stumble across a midnight meeting, she discovers that the money he owes isn't all Grandfather was hiding. And the secrets he kept have now trapped Theresa in a life-threatening fight for her home - and the truth.  

Brook Eden has never known where she truly belongs. Though raised in the palace of Monaco, she's British by birth and was brought to the Grimaldis under suspicious circumstances as a babe. When Brook's friend, Justin, uncovers the fact that Brook is likely a missing heiress from Yorkshire, Brook leaves the sun of the Mediterranean to travel to the moors of the North Sea, to the estate of her supposed family.