Aria Vale is drowning. Her father's debt has fallen on her shoulders, her little brother's heart is failing, and the man collecting on that debt has just cornered her in a rain-soaked alley with nothing left to trade but herself.Then a stranger steps out of the storm.Kade Blackthorn is a billionaire, a recluse, and the most feared name in the northern mountains. Nobody has ever seen him smile. Nobody crosses him twice. In one night, he pays off her father's debt, covers her brother's surgery in full, and offers her a way out that sounds too good to be real: marry him for one year, play the perfect wife in public, and walk away with five million dollars when the contract ends.Three rules. Play his Luna in public. Never touch him in private. Never fall in love.Aria has no choice but to sign. She doesn't know that "Luna" isn't just an old family word, and that the man who saved her is about to bring her into a world she never knew existed.Blackthorn Hall is not just a mansion, it's a fortress ruled by a pack of werewolves, and Aria is the first human ever to wear the title of Luna. The staff fear her. The elders despise her. And every time Kade touches her, a strange silver mark burns bright on her wrist, one the pack's oldest members go pale just looking at.She soon learns the truth is far more dangerous than a fake marriage. Her mother, believed dead for years, was once a healer inside this very pack, a woman who vanished twenty-five years ago after stealing something the Blackthorns have hunted for ever since. And Aria carries the same blood.As a rogue attack forces Kade to reveal his true nature, as a hidden portrait uncovers her mother's buried past, and as an elder turns up murdered with evidence planted to frame her, Aria finds herself fighting not just for her freedom, but for her life. An ancient trial by moonlight threatens to expose exactly what she is in front of the entire pack, and a rival Alpha's hidden alliance may cost her everything before the truth comes out.Through it all, the man who was never supposed to touch her becomes the only one she trusts completely. Every rule he wrote is a rule he breaks. Every wall he built comes down one confession at a time. And the bond neither of them chose becomes the only thing standing between Aria and the people who want her dead.A contract marriage. A forbidden bond. A secret bloodline worth killing for.She signed to save her brother's life. She never expected to fall for the Alpha who bought her freedom, or to discover that the man behind the contract has been protecting her from a war three generations in the making.Some bonds can't be signed away. They can only be claimed under the light of a blood moon.