Well, Shit

Well, Shit is a companion quest for Varric in Dragon Age: Inquisition.

Bianca says Corypheus is getting his red lyrium from the thaig Hawke and Varric discovered years ago on their expedition into the Deep Roads under Kirkwall. It may be possible to reach it using an entrance to the Deep Roads somewhere in the Hinterlands.

Acquisition

Available after completing the main quest Here Lies the Abyss and the Inquisitor has gained enough approval and is now friends with the dwarf.

Talk to Varric to trigger a cutscene when he is seen speaking in his usual spot to a female dwarf called Bianca. She explains that there is a lead for Corypheus' red lyrium source, as the location of a mine in Valammar has been leaked. Agreeing to help her starts the quest.

Note: It is possible to venture to Valammar earlier during the quest Deep Trouble, but doing so will not have any negative consequences to pursuing this quest.

Walkthrough

Bianca's-Key-Valammar — The key to the red lyrium mine

Note: If this is your first time in Valammar (i.e. you've not yet completed Deep Trouble), it is advisable to have at least one mage and one warrior in your party as there is a darkspawn cave to be closed by energizing it, and a few walls to be bashed.

Enter Valammar in the Hinterlands with Varric. The fastest way there is fast traveling to Upper Lake Camp. Bianca will be waiting inside Valammar and, after a cutscene, will accompany the group. Head to the lower terrace and let her open the large, stone door that leads to a previously inaccessible area.

Kill the mobs in the room. A codex entry can be found here as well. The key is found in the end of the room, on the desk.

Note: Be sure that the key is the last thing you take. Picking it up will initiate a cutscene. Afterwards, you will be transported outside of the stone door and the area will not be accessible again for the remainder of the game.

In the following cutscene, it is revealed that Bianca was the leak. She gave the red lyrium mine's key to a corrupted Warden (Larius/Janeka, depending on the choices during Legacy) and therefore unknowingly aided Corypheus.

Return to Skyhold and speak to Varric about what happened.

Rewards

1,025 XP
400 Influence
3 Power

Results

When talking to Varric, there is now the option to ask more about Bianca.
Varric's Tarot Card changes to "The Sun".
A friendship cutscene for Varric becomes available given a high enough approval.

Approval

Open the locked door

Cutscene

That was handy. - No approval change.
You were waiting to do that. - Varric Slightly Approves
There's no time to waste. - No approval change.

Finding the key

Bianca: I just ... wanted to figure it out.

Did you? - No approval change.
You're not saying everything. - No approval change.
That was stupid. - Varric Slightly Approves

Bianca: Then I went to you.

It isn't really your fault. - Varric Slightly Approves
You put this on us. - Varric Slightly Approves
You've done a lot of damage. - Varric Disapproves

Varric: As if i would tell stories about my own mistakes!

Varric is right. - Varric Slightly Approves
She's right. - Varric Slightly Approves
Just let it go. - No approval change.
Get a room, you two. - No approval change.

Back at Skyhold

Varric: And I am not good at dealing with shit like this.

Nobody is. - No approval change.
Talk your way out of it. - Varric Slightly Disapproves
Just confront it. - No approval change.

Varric: If Cassandra hadn't dragged me here, I'd be in Kirkwall right now, pretending none of this was happening.

No you wouldn't. - Varric Approves
Nothing's stopping you. - Varric Slightly Approves
She did you a favor. - Varric Slightly Disapproves

Bugs

If you entered Valammar previously and sealed the tunnel, a new Hurlock alpha will spawn on your return and the Inquisitor will still remark that the hole needs to be sealed even if it already has been.
If the key to Valammar is obtained for the quest Deep Trouble before Bianca unlocks the entrance to the thaig, the quest may not complete.
Even after the quest in Valammar is completed, the quest Deep Trouble will still activate, instructing the player to locate a key into Valammar