You play a character that is there to clean up the world of it's monsters and by doing so you will get closer and closer to the monster's fortress. Once you get there you will have to defeat 5 bosses to free the world and it's people of all of these evil creatures. Along the way you can interact with other characters who inhabit the world. Some will ask you to go on a quest. Others are a way to check your inventory and buy things for your arsenal. Watch out for any of the green monsters, they can take your life.