You will need to complete this quest to complete the Berserker Trust chain. Completing the quest is necessary to gain the trust of Rat and so you can gain access to the top of the fort.
Wolf is near Chloe’s bar (you will encounter this during the Unwanted Morkon quest) and he will scream for help as you approach. Talk to him and fill in all the clues, then accept his request for help and he will hand you two items. Open your inventory, examine it, and talk to Wolf again to answer questions about it:
Nail – “It looks like this nail was made in the forge.”
Flyer – “The back of the flyer is pretty interesting.”
You will get 100xp for answering both questions correctly.
Once you answer – he will give you his suspects, Chloe the Keeper and Lasse the Blacksmith. It’s time to talk to both of them.
Baxter’s Propaganda – Chloe.
Head straight to Chloe and show her the flyer – but whatever you say here is irrelevant.
Baxter’s Propaganda – Lasse.
Walk up to Lasse and talk to him. Make sure you have beer in your inventory. Lasse will like it if you give him a beer, you can continue the conversation, which will allow you to show him the nails.
Once you show him the nails, he will tell you that he stopped making them because they kept getting stolen, similar to what you heard from Chloe.
Before you leave, you can ask him to forge you a special weapon, and he will give you an Artist’s Weapon assignment.
Baxter’s Propaganda – Check with Wolf
Go back to Wolf now and share what you found, he will be stumped, so you will put your heads together to figure out the next steps. He’ll have you dig around the fort after dark to catch someone red-handed. There is a small cabin nearby that you can sleep in for free.
Going on patrol, you’ll find some interesting people, but nothing that leads to the answers you’re looking for. Wolfe is headed for the bar, but now you have an area of interest on your map — go there.
Once you get there, someone named Skinny will tell you that he needs to talk to you. Follow him, and he’ll explain who’s to blame, and he’ll have an offer and 500 shards.
If you want to stay with the Berserkers, be sure to go back to Wolfe and tell him what you found. He’ll tell you to play along and find out who’s all involved. Or go straight to Skinny. Either way, you go back to him.
Stealing for Skinny.
Go back to Skinny and tell him you will work with him, but he will make you steal something for him.
Mole’s Lair Mission.
After you complete the “Stealing for Skinny” mission, he will take you to the hatch to meet the mysterious leader of the Claws. Follow him and enter the hatch. Watch out, it’s a long way down.
Once you are down, say hello to the leader, Yasma. Pass the ring when she asks you to keep working on gaining trust. When she asks – tell her the truth – you were sent by the berserkers. She will appreciate it since she already knew. She will give you one last test – plant some propaganda and tell Wolf where she is.
“Berserkers.”
Give Wolfe the real location and he will give you some shards and his trust. You can go back to Fenris for the Berserkers Trust and he will give you access to the Upper District and the Rat.
Reward: 1000 shards
“Claws.”
If you choose Claws, you will give Wolf the information Yasma told you to give him. He’ll treat it as mission accomplishment and re-grant you access to the upper area, allowing you to continue the Berserker Confidence.
Go back to Yasma at the shelter and she will tell you all about the Claws and their mission. You still need to become a member of the Berserkers, as they need more information, but you are now a member of the Claws (basically the Thieves Guild) and have access to new missions from them.