Seventeen-year-old Tilly finds herself on the run from her cruel adoptive family - a coven of witches who seek to use and abuse her Power. With no one to turn to, she stumbles into a brooding young man and his family who offer her sanctuary. With a terrible secret to keep, Tilly knows she should move on, but every time she tries to leave, she is held back by the tie she feels to the enigmatic and hostile Spencer. Spencer hides his own secret - he and his family are werewolves. Even as an outcast, he is duty-bound to protect this secret and the pack that barely tolerates him. But there's something about Tilly that makes him want to break all the rules. Tilly and Spencer find themselves drawn to each other, but their love is not just taboo-it's impossible. Their two worlds were never meant to mix, and their love could threaten to tear them and the pack apart. As the witches close in on Tilly and endanger the pack, they must decide whether their love is worth fighting for, or if they will be forced to sacrifice everything.