A Cornered Rat is part of the Main Quest questline. You can start it by completing Diplomatic Immunity.
Objectives in order
Journal entry
The Thalmor are just as puzzled as we are about why dragons are returning. I learned that they are looking for a Blade named Esbern, who Delphine says is an expert on ancient dragon lore. We need to find him before the Thalmor do. Search the Ratway for Esbern's hideout Journal entry
The Thalmor are just as puzzled as we are about why dragons are returning. I learned that they are looking for a Blade named Esbern, who is supposed to be an expert on ancient dragon lore. I've learned that he's hiding out in the Ratway Warrens in Riften. Journal entry
The Thalmor are just as puzzled as we are about why dragons are returning. I learned that they are looking for a Blade named Esbern, who is supposed to be an expert on ancient dragon lore. I found Esbern hiding in the Ratway in Riften, and convinced him to let me in to explain myself. Journal entry
The Thalmor are just as puzzled as we are about why dragons are returning. I learned that they are looking for a Blade named Esbern, who is supposed to be an expert on ancient dragon lore. I found Esbern hiding in the Ratway in Riften, and convinced him to let me in to explain myself.