The dark Lords are controlling the underground Elves and the Elves keeps the dark lord happy by paying protection money. Ultimately the Elves accept to give their youngest Drow Princess to the Dark for the rituals of black magic. You being the weapons master and bearing the love on the Drow Princess, follow the trails that the princess left while traveling to the surface. Keep in mind that now you have become enemies to both underground and the surface and you get to meet lot of battles on the way to find your princess.