Oblivion:Two Sides of the Coin

Quick Walkthrough
# Listen to rumors around Bruma to learn about a man making off with his girlfriend's money.
# Speak with Arnora Auria.
# Get into the jail to speak to Jorundr.
# Decide on your course of action and receive your reward.

Detailed Walkthrough
Arnora Auria
Listen to rumors around Bruma to learn of a woman named Arnora Auria whose boyfriend Jorundr tried to run away with her money. He was caught in the act and is being held in the Bruma jail.

Speak to Arnora in her house behind the chapel. When her disposition is high enough (60+) she will tell you that she and Jorundr are actually a pair of thieves who made a living by stealing just enough to get by. According to Arnora, Jorundr started wanting more and eventually killed a guard while robbing a tax collector. Days later, while Arnora was getting some food, guards captured Jorundr at their camp. Unfortunately, he had hidden the tax money and Arnora cannot get to it. Arnora asks you to speak with Jorundr and find out where the money is hidden.

If Arnora dies at this point (specifically, if she dies before you strike a bargain with Jorundr), the quest will end as soon as you talk to Jorundr. In this case, you receive 1 Infamy point (instead of the usual 1 Fame point) and you do not receive any reward.

Speak with Jorundr
You will find Jorundr in the Bruma jail. No matter how much you persuade him, he will not trust you. In order to gain his confidence, you will have to get yourself arrested and sent to jail. A quick way to do this is to pick up one of the items on the jail tables or attack the guards. Once you have been jailed, Jorundr will tell you that it was in fact Arnora who grew greedy and killed the guard. Jorundr tells you that he will reveal the location of the money if you kill Arnora and bring him her amulet.

If you wait a while before serving your sentence, a guard named Tyrellius Logellus will approach Jorundr and try to convince him to reveal the location of the treasure.

See the crime article for details on how to serve your sentence or, alternatively, how to escape from jail.

Choosing Sides
There are two ways to proceed at this point: 

Kill Arnora. The easiest way to do this is to tell her you'll kill her and run outside. She will follow and the guards will proceed to attack her. You can also choose to kill her in cold blood (without initiating conversation) and initiate the Dark Brotherhood quest line.
: Take the pendant and her keys. If you return to Jorundr immediately, he will tell you that Arnora's true amulet has a red stone, not the blue one you've taken from her body. Return to the house and search her bedroom chest to discover the true one.
:* You can save yourself the extra footwork by taking the true amulet from the chest before seeing Jorundr to report Arnora's death.
Alternately, trick Jorundr into believing that Arnora is dead. To do this, tell Arnora you will help her and she will give you the key needed to retrieve the true amulet.
However, if you choose this method and then proceed to kill Arnora in cold blood before discovering the gold's location, the quest will automatically end with a message that one of the persons needed in this quest has been killed.

After acquiring Arnora's True Amulet by any of the aforementioned methods, ask the Jailor to allow you to speak to Jorundr in the jail. Show the amulet to Jorundr. He will believe that Arnora is dead and tell you the location of the treasure.
If you allowed Arnora to live, Tyrellius will be waiting for you by the treasure chest. He has killed Arnora and will now try to kill you.
If you killed Arnora to gain the amulet(s), Tyrellius will not appear.

Reward
The treasure includes two skill books. One of the books will always be one of the seven Stealth skill books that appear in random loot; the other books will be for either a Magic or Combat skill (selected from one of the thirteen skill books that appear in random loot).

Notes
You may want to do this quest very early in the game. The leveled reward for this quest is rarely worth the effort, but Tyrellius wears a  full suit of chainmail armor (except for a helmet) and is armed with a silver longsword.
If you attempt to sneak past Tyrellius, a message will pop up saying "I'll need to deal with Tyrellius before I can open the chest."
You cannot pickpocket Arnora's Chest Key. It is scripted to appear on her corpse when she dies, or is given to you. (Arnora's Key is different, and opens her house.)
Once Jorundr tells you where to find the stolen gold, Arnora's amulets are changed from quest items to standard items. At this point, it becomes possible to drop, duplicate, or enchant them. The keys can be dropped at the end of the quest.
If you choose to kill Arnora, you can gain both amulets: the blue fake and the red real one.
You can show Jorundr both the real and the fake amulets for a little bit of extra dialogue.
If you choose to trick Jorundr, you get only the red amulet. When Tyrellius subsequently murders Arnora, the blue amulet she wore is missing from the body.
For an amusing variation, trick Jorundr and get Tyrellius to follow you back into Arnora's house and down the basement. Arnora will not yet be dead and will kill Tyrellius for you, at which point she will vanish and her body will appear on the first floor inside the door.
If you do this, resist the temptation to use the Staff of Worms on her "new" corpse until you complete the quest. The zombie cannot move, and when it re-dies you will receive the "NPC needed for this quest has died" notification.
If, as soon as Tyrellius draws his sword to attack, you run directly to the Bruma gate, upon returning Tyrellius may no longer be hostile. He will use the same dialogue but will not attack.
If you opt to kill Arnora, her body will be marked as a quest item and will not disappear. You cannot safely use Arnora's house for storage or to sleep.
After giving Jorundr the red amulet, you can kill Arnora and get the blue amulet off of her corpse. The game will say that the quest cannot complete because Arnora is dead (Stage 200). Then go to the location of the treasure and kill Tyrellius, and the normal quest messages come up (Stage 140), and you can open the chest as well (150). But, when you return to Arnora's house to find her "new" corpse, the quest will not update to Stage 160 because the game thinks that you already finished it. Use the console and type in   to fix this. 
Stage 160 of the Quest Journal says, "I've found Arnora's body in her house. Tyrellius has indeed killed her. I should probably leave before the town guard thinks I had something to do with it. On the bright side, all of Jorundr's gold is now mine." - The town guard never enters Arnora's house as no bounty is put on the player's head.

Bugs
 
 
 
 

Journal Entries