You've returned from laying seige to the wolf, only to find one of his advance parties about to lay seige to your castle! In your absence, bandits have also set up camp nearby. break through their lines and save the day!
(full story comes w/ map)
Also, The map IS winnable all the way up to very hard, you just have to be quick. (So if you find it too easy, just put the difficulty up a bit.)