All her life, Vaasa Kozár has been sharpened into a blade.

After losing her mother-her only remaining parent-to a mysterious dark magic that has since awakened within her, Vaasa is certain death looms. So is her merciless brother, who aims to eliminate Vaasa as a threat to his crown. In one last political scheme, he marries her off to Reid of Mireh, a ruthless foreign ruler, in hopes that he can use her death as a rallying cry to finally invade Reid's nation. All Vaasa has to do is die.

But she is desperate to live. Vaasa enters her new marriage with every intent to escape it, wielding the hard-won political prowess and combat abilities her late father instilled in her. But to her surprise, Reid offers her a deal: help him win the votes to rise in power, and she can walk free. In exchange, he will share his knowledge about the dark magic running through her veins-and help keep it at bay.

This proposal may be too good to refuse, yet Vaasa and Reid's undeniable attraction threatens to break the rules of their arrangement. As her brother's lethal machinations take form, everything is at stake: Vaasa must learn to trust her new husband, but how can she, especially when their perfect political marriage begins to feel like the real thing?