Carry out the investigation and uncover the saboteur in the Tightening The Screws side quest in Tainted Grail The Fall of Avalon.

As you explore the vast landscapes of Avalon in Tainted Grail The Fall of Avalon, you will encounter various NPCs. Much like in real life, each NPC has unique problems. They are in desperate need of someone to actually lend a hand. One such quest is Tightening The Screws, where guards and workers needs your help to find a saboteur who disrupts their operations.
Follow the guide for a complete walkthrough of Tightening The Screws side quest, breaking down the objectives step by step.
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How To Complete Tightening the Screws Side Quest in Tainted Grail The Fall of Avalon
Talk to the Guards To Start the Quest

You can start the Tightening the Screws side quest by interacting with the guards near the Last Tree at the Cuanacht. The exact location of the guards is shown in the above image. You will find two guards talking about recent sabotage incidents. Approach them to learn about the sabotaging activities that ruin their operations.
Moreover, the saboteurs even attacked one of the guards last time, making the situation more severe. The guards direct you to one of the workers and ask you to find the lead about the saboteur’s hideout.
Gain More Details From Mervyn

During the conversation with the guards, they will mention that Mervyn, one of the workers, saw some bandits head toward an abandoned cave. Interact with Mervyn, who is located just behind the guards. He explains that the cave was once a safe shelter, but is now being used as a hideout by the bandits.
Clear the Abandoned Cave and Get the Letter
Head east by following the quest marker to find the secret cave. Interact with the entry point to get into the Old Shelter. Inside, you will encounter a larger number of enemies, including Corpse Eater, Desperate Archer, Disgraced Knight, Outlaw, Desperate Infantryman, and Outcast Villager. So be prepared for a tough fight.
Once you take care of all enemies, examine the table in the last room. There, you’ll find a document that reads ‘Letter Written in Coal’, a message from the bandit leader. Picking up the letter completes the Tightening the Screws side quest.
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