Knightly Troubles

After you complete The Recipe for Happiness, Logain will ask for a moment of your time. He will tell you that he used to train the young students at the Brotherhood of Knights, but when he went there the other day they had begun to act strangely. He assumed they had taken a strength potion to increase their abilities, possibly poisoned, and went to inquire, but they became aggressive, so he left. He returned only to be attacked on sight. As he is old and unable to win a fight against many young men, he would like you to head in to the Brotherhood of Knights and find out where they got the poisoned strength potions.