As you explore Riften and the Thieves Guild in Skyrim, you will come across Delvin Mallory and Vex. These two NPCs are members of the Thieves Guild and are associated with a few different quests. If you are looking to complete the Under New Management quest, you will need to complete a separate quest for Delvin.
Related: Skyrim: Under New Management Quest Walkthrough
In this guide, we are going to go over how to complete Summerset Shadows, the associated Thieves Guild quest for Windhelm. Other cities, such as Markarth and Whiterun will also have Thieves Guild quests that can be accepted from Delvin. First, let's look at the prerequisites that you need to complete before beginning Summerset Shadows.
This quest will only become available once you complete five small jobs for Delvin and Vex. To get a small job, all you need to do is talk with one of these NPCs.
Small jobs are randomly generated (also called Radiant), tasking you with retrieving an item from a specific location. In general, these small jobs are relatively short and should not take too much time.
After five jobs have been accepted and completed for Windhelm, Delvin will tell you that there is a rival guild named Summerset Shadows that is making some noise, and you need to look into it.
Upon speaking with Delvin, he will tell you of a wealthy merchant named Torsten Cruel-Sea that needs help. Your first task is to travel to Windhelm and speak with him. You can find Torsten walking around the city, as well as around the walls.
Once you speak to him, Torsten will tell you that this rival guild has killed his daughter and stole her silver locket. Fortunately, Torsten has already killed the one responsible for the death of his daughter, but while doing so, he also
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