As the war rages across Europe, Leander Ashby, the fearless and elusive second son of the Duke of Lionston, has spent years working in the shadows as a spy for the Crown. But when tragedy strikes—his father and elder brother killed in a devastating accident—Leander is forced to return to England and assume the title he never expected to inherit. Though duty binds him to his family’s legacy, he cannot abandon the work he believes in. Determined to continue aiding the war effort, he founds The Lion Watch, a covert spy agency operating beyond the limitations of the war office. While others fight on the battlefield, he wages war in the shadows, pulling the strings of a clandestine network that may be England’s best hope against its enemies.

But one obstacle he never anticipated? Lady Sabrina Fairfax—the sharp-witted, independent daughter of the Earl of Whitmore. Once childhood friends, their paths diverged when Leander left to fight a war she would never see. Now, years later, he is no longer the reckless second son she once adored, but a hardened man burdened by secrets. Drawn into his world of deception, Sabrina refuses to be left on the sidelines. She is no damsel to be protected, nor a pawn to be played. And when she stumbles upon a plot that threatens both the Crown and The Lion Watch, Leander has no choice but to trust her with the truth.

As danger closes in and passion ignites between them, Leander and Sabrina must navigate a perilous game of espionage, betrayal, and undeniable longing. But as war looms on their doorstep, can love truly survive in a world built on secrets? Or will their newfound bond be the one weakness their enemies exploit?