There is a war going on against monsters and the rewards would be great for the victors. Jack want to be in, but then again, he is not that strong. He is better of to use his talent to make money by building weapons. In this game, you need to build some weapon for the army. You need to build them strong weapons, so they can't be defeated. The game would be harder as you make some progress, so you need new materials. You could also find some new weapon plan once you win the battle. This game would be more exciting as you make some progress since you are able to build new weapons.