you are approached by the three remaining members of the Waterdeep royal family, "we have heard of your accomplishments, and we are here to offer you a chance for glory, gold, slaughter, and target practice, as you probably understand, Waterdeep was take by a goblin/demonic army, and we would like to retake our city, save our people, and beat the demons off, back into the abyss. will you help us?"