After almost a year of working together, Grace and Euan Cameron have become the premiere Watcher and Companion team for the history-guarding Council. When Grace is suddenly called on a solo assignment, Euan protests her going alone, afraid of being in a position where he cannot assist her and unable to shake his bad feeling about the entire mission. Everything goes horribly wrong upon Grace's arrival at Versailles in 1748, leaving her cut off from The Council and unable to be extracted. Euan, against all protocol, is sent to bring her home, but the stakes are higher than anyone could have realized. To save Grace, Euan must face the ghosts of his past head-on to prevent a third attempt to restore the Stuart monarchy ‒ can he do it before her time runs out?