Fifteen years later, Phoebe is in love with Sam, a practical, sensible man who doesn't fear the dark and doesn't have bad dreams—who, in fact, helps Phoebe ignore her own. But suddenly the couple is faced with a series of eerie, unexplained occurrences that challenge Sam's hardheaded, realistic view of the world. As they question their reality, a terrible promise Sam made years ago is revealed—a promise that could destroy them all.