Lana has spent eighteen years believing she is human. But on the night of her eighteenth birthday, a mysterious mark awakens on her shoulder—and with it, a secret that could destroy her life. She is the lost heir of the Silver Pack, bound by an ancient Blood Bond to Adrian, the enigmatic heir of the feared Black Pack. Their bond promises to share their powers, but it also carries a deadly condition: they must marry before the age of twenty-one, or both will die. Adrian has no intention of surrendering his freedom to an ancient curse. Ordered to eliminate Lana, he has already tried to end her life. Yet as their bond awakens, the emotions connecting them become harder to ignore. With only one year left, Lana must enter a supernatural world that once tried to kill her. She refuses to let fate decide her future—even if breaking the bond means killing the man destined to be hers. Can two enemies escape a bond written in blood, or will their growing connection become the very thing that destroys them?