The Keeper of the Border Fortress

What does a runaway slave and bandit think when he is mistaken for a master and is ceremonially presented with authority over a border fortress? Where to run, before the mistake is revealed! But how to flee when an enemy army stands outside the walls and the defenders look at you as their last hope? You'll have to fight against the monstrous Submountain Beasts, sorcerers, and men with their laws.