Slay the crazed villagers."I awoke in a putrid barn lying on a filthy cart. Oswen was preparing to slit my throat when the holy man from the shed broke into the barn and set me free. Now we fight our way out."
After awaking, the Wanderer is forced to kill Tovri, Devmir, and Isbel. After this, interact with the door to leave the barn. Here the Wanderer will be confronted by Vani and Stanis. Once all the crazed villagers are dead, speak with Iosef. A key is needed to enter the chapel. Acquire this from Vani's body and this completes the quest.
Iosef:"Madman? Those heretics drugged me after I returned from the ruins...just like you. I came to my wits and escaped. Tried to get inside the chapel, but it was locked and--
The Wanderer retches, throwing up bile and red petals.
Iosef:What manner of evil is this? Petals...of blood?
Wanderer:They...they must have fed them to me.
Iosef:A blasphemous ritual. How did they learn this? Perhaps the answer lies in the chapel. They kept it locked up for a reason...The key might be on that woman who was leading them.