Kate Braestrup's life was transformed by the loss of her husband; now Kate faces the possibility that she may lose her son. As a young mother, Kate Braestrup discovered the fierce protectiveness that accompanies parenthood. In the intervening years -- through mourning her husband and the joy of remarriage and a blended family-Kate has absorbed the rewards and complications of that spirit. But when her eldest son joins the Marines, Kate is at a crossroads: Can she reconcile her desire to protect her children with her family's legacy of service? Can parents balance the joy of a child's independence with the fear of letting go? As Kate examines the twinned emotions of faith and fear -- inspired by the families she meets as a chaplain and by her son's journey towards purpose and familyhood -- she learns that the threats we can't predict will rip us apart and knit us together.