Caroline Delacroix is at the pinnacle of Washington high society in her role as secretary to the First Lady of the United States. But beneath the facade of her beauty, glamorous wardrobe, and dazzling personality, she's hiding a terrible secret. If she cannot untangle a web of foreign espionage, her brother will face execution for treason.

Nathaniel Trask is the newly appointed head of the president's Secret Service team. He is immediately attracted to Caroline's quick wit and undeniable charm, but his job leaves no room for distractions. Anarchist plots have led to mounting threats again the president, forcing him to put duty before his growing love for Caroline.

Amid the glamorous pageantry of Gilded Age Washington, DC, Caroline and Nathaniel face danger and heartbreak that shakes them to their core and tests all they know about love and sacrifice.