For three days out of thirty, when the moon is full and her law is iron, the Great North Pack must be wild. If she returns to her Pack, the stranger will die. But if she stays . . . Silver Nilsdottir is at the bottom of her Pack's social order, with little chance for a decent mate and a better life. Until the day a stranger stumbles into their territory, wounded and beaten, and Silver decides to risk everything on Tiberius Leveraux. But Tiberius isn't all he seems, and in the fragile balance of the Pack and wild, he may tip the destiny of all wolves . . .