Caroline Payne thinks it’s just another day of work until she receives a call from Mat Hammond, an old college friend and historian. Mat has uncovered a scandalous secret kept buried for decades - In World War II, Caroline’s British great-aunt betrayed family and country to marry her German lover.

Determined to find answers and save her family’s reputation, Caroline flies to her family’s ancestral home in London. She and Mat discover diaries and letters that reveal her grandmother and great-aunt were known as the ‘Waite sisters.’ The buoyant tone of the correspondence soon yields to sadder revelations as the sisters grow apart, and one leaves home for the glittering fashion scene of Paris, despite rumblings of a coming world war.

Each letter brings more questions. Together, Caroline and Mat uncover stories of spies and secrets, love and heartbreak, and the events of one fateful evening in 1941 that changed everything.

In this rich historical novel from award-winning author Katherine Reay, a young woman is tasked with writing the next chapter of her family’s story. But will Caroline’s findings heal her family’s decades-old wounds and allow her to embrace a love of her own, or will they tear them even further apart?