With the orc hordes invading, the king needs a lot of magical ore to create enough weapons for his army. All the criminals are now sentenced to work in the ore mines till the end of their days. To prevent them from escaping, the king has a group of powerful wizards create a magical, impassable barrier. But the barrier grows out of control, capturing a large chunk of terrain within itself, and the wizards become imprisoned inside. In the confusion that follows, the prisoners kill the guards and take over the whole area within the barrier.