Ten years ago, in the remote mountains of Colorado, a young girl watched helplessly as her family was murdered by a pack of angry men for the secret they carried in their blood.  She survived by running into the woods, and changing into something the hunters could never find … a wolf. Now, though she lives half a world away, Vivian Gandillon (Agnes Bruckner) is still running.  Living in relative safety in Bucharest, Vivian spends her days working at a chocolate shop and nights trawling the city’s underground clubs, fending off the reckless antics of her cousin Rafe (Bryan Dick) and his gang of delinquents he calls “The Five.”  But only when she’s running through the woods around the city does Vivian feel truly free … though whatever she’s chasing seems continually to elude her.

Aiden Galvin (Hugh Dancy) is an artist researching Bucharest’s ancient art and relics for his next graphic novel based on the mythology of the loup garoux – shapeshifters whose power to change effortlessly into the forms of both human and wolf was once considered holy among men.    Wrestling demons of his own, Aiden hopes to explore the inner lives of these outsiders that he believes were persecuted to extinction – labeled monsters, murderers, werewolves.  They achieved what he lacks – transcendence, the ability to change what they are.  What he doesn’t know is that the loup garoux are not only very real, they’re far from extinct.   During a chance encounter in an abandoned church celebrating the loup garoux, Aiden unknowingly comes face-to-face with the real thing …  Vivian.

Others may have secrets but none as extraordinary as hers, for Vivian is among the last of her kind, leading a tenuous existence under the protection and control of Gabriel (Olivier Martinez), the powerful and enigmatic leader of one of the last packs of loux garoux on earth. After their brief exchange in the church, Aiden can’t get Vivian out of his mind, nor can she forget him.  He pursues her until she relents and begins to see him, but she can’t bring herself to tell him the truth – and lives in fear of showing him what she really is.  If she bleeds, her eyes will betray her as a loup garoux.  And what’s worse:  her future, and who she falls in love with, is already predetermined.   

To keep their kind from being hunted to extinction, Gabriel holds them to strict laws.  One is that he must take a new bride every seven years, and Vivian has been prophesied to be his next. The other is that the pack must hunt as one or not at all.  It is the very key to their survival.  Chased from the soil of every continent, only in Bucharest – where once a Magyar prince was said to have loup garoux blood – have they found sanctuary.  On the night of the full moon, they gather as one in the woods outside the city.  Though the wolves are outnumbered by man, on the night of the hunt, they can be who they truly are – hunting a single chosen human as a pack.  If their prey reaches the other side of the river, he will be allowed to live … but no human has ever reached the river.    

Though Vivian has sworn never to kill, she is as much animal as she is human, and her love for Aiden threatens to cast him to the very wolves who saved her life … and who are waiting for their chance to hunt him as prey.  And the full moon is almost upon them.