Long ago, In the country of Ibisa, the peaceful Kurisiki people lived peacefully. Then, the evil Kubashka warriors came, destroyed everything, and all-around acted like the stormtroopers from The SpaceBalls! Since then, 3,000 years have passed, and the Kurisiki people are leading a resistance to destroy the Kubashka. You, as one of their new recruits, must train and learn the ways of the Kurisiki peoples, then lead an army to destroy… The Kubashka.
(Or, you can just run around, kill stuff, make money, and otherwise entertain yourself.)