A thousand years ago, Konstantine Varinski roamed the Russian steppes. Driven by his craving for power, he struck a terrible bargain. In return for the ability to change from a magnificent warrior to a predator that could hunt down his enemies and kill them, he promised his soul — and the souls of his descedents — to the devil.

Plain Ann Smith loves her handsome, dynamic boss, Jasha Wilde, but her daring plan to seduce him goes awry when she finds a black wolf warming itself before the fire. Before her horrified eyes, the wolf changes into the man she adores. She flees, he pursues, but they can't escape their destinies.

For Jasha is the descendant of Konstantine Varinski and Ann is the woman fated to break the curse that binds his soul. To find heaven in each other's arms, they have the devil to pay.