I got this quest by going into the High Gate Ruins for the very first time. The High Gate Ruins are located about halfway between Solitude and Dawnstar. North of Ustengrav. Anyways, inside you'll meet Anska, who will ask for help location a family scroll. She's worried about an old priest named Vokun (who is a Dragon Priest, so be warned!). Agree to help her to get this quest.
She will be your follower now, and she is a fire mage. Head into the next room (which is huge) and take out the 2-3 Draugr in this area. There's a chest on the lower level and the upper level that you can loot before going onwards through some iron doors. You'll reach a room with an arcane enchanter and several Draugr in it, so take them out and loot the room (there is a LOT of stuff here to grab). Go through the next door and watch out for the floor plate. In the next room you'll have to solve a LEVER puzzle. There are FOUR levels in here and we have to hit them in a certain order.
To see the order that you need to hit them in, go stand in the middle of the room and look up. You should see them in this order:
FIRST: EAGLE SECOND: WHALE THIRD: FOX FOURTH: SNAKE
Now you just need to run around the room and hit the levers in that order, since each lever has a picture of an animal on it. Two levers and upstairs and two are downstairs. Proceed downwards now and enter the catacombs.
Down here you'll fight more Draugr and head down yet again. Your main threat here is mostly wall Draugr. Be sure to check out Anska's fire magic, it is VERY powerful (this coming from a non-mage). You'll come to a long hallway that has SEVERAL floor-plate traps in it, so get past that and hit a series of Draugr-guarded levers afterwards to reach "Vokun's Throne Room".
As you would expect, your fight with Vokun is coming up. He's a DRAGON PRIEST so you know you're in for a fight. Save, get your potions ready, and hit him hard while he focuses on Anska (or, hopefully, another follower). He casts VERY strong fire magic, but you can do it! Be SURE to loot him afterwards for the VOKUN mask (which we'll need later) and then feel free to loot the area beyond his tomb. There are two chests back here with several goodies as well as a WORD WALL which teaches WRATH - STORM CALL. Be sure to pick up the scroll that Anska wants as well and give it to her to COMPLETE this mission.