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(See Miscellaneous Bloodmoon Quests at GameBanshee Walkthrough section)Rescue Mirisa
Talk to Jeleen in the Imperial Cult Shrine and he’ll ask you to find Mirisa. She’s being held captive in Thirsk. Inside Thirsk, Mirisa is upstairs in a locked room. You can pick the lock on your own if you like. You can also pickpocket or Kill Erich the Unworthy downstairs for the key. The other people in the hall won’t mind. Erich might already be dead on the floor (see the Thirsk quests), and you can loot his corpse. Regardless, once you free her, you have the unpleasant task of escorting her back to Jeleen in Fort Frostmoth. If you succeed, Jeleen will give you 300 gp. If she gets killed along the way, Jeleen will give you 100 gp, and after you leave, he’ll kill himself. You can return to find his suicide note on his body. Grim.
Note: if you do this quest after doing the Thirsk quests, Svenja in Thirsk will have set Mirisa free and you’ll find her in Solvjord, a cave a little west of the Iggnir River about halfway along its length.