Well, you start as a samurai. The game brings you straight to battle - it's 1274, Mongolian invasion to Japan. Almost all your soldiers d*e, but you escape. Then you gather forces to save your uncle and then go to the north, to defeat the Mongol leader.
It's a pretty nice game, but I played on the easiest difficulty, because I'm not that skilled. Overall it's good, there's a big map, you can collect resources, learn new techniques etc.