As you approach the keep, you'll see that things aren't right. Help the soldier kill the three genlocks. If you have trouble with this, then you're really in trouble. Once the fight is over, you can talk to your new ally Mhairi. She's a level 21 shield warrior. She's really powerful and she's a big help. You can go ahead and level her up a bit now if you want.
Approach the gate and watch the left side of the field. There should be some genlocks we need to kill. I counted 5. There's are chests on the left and right side. Go ahead into the fortress and engage the first group. There are some shrieks here too and an ogre. The ogre's weak though, so it should die in a few hits. Turn to the right side and rush over to help the soldier. Try to save him if you can. He'll head to the gate and set the rally point.
Go over to the raised platform on the left. Gut the three hurlocks and save the terrified merchant. Loot the area and then walk along the wall to the next area. There should be another soldier you can save on the right side. Cut a path through to him and add him to the force you're building. Approach the big gate by going up the single set of steps. The mage behind it will blow the gate upon and clear you a path, but it will also probably knock you down. You should be safe just killing the two hurlocks and then rushing the mage. If you're having trouble, rush on ahead and kill the mage first. Mhairi can handle the hurlocks.
