A man is taken in for a crime years ago. Any who ask or willing to listen, he tells a tale of how he ended up in such a position. So far fetched is the story that many believe it to be false. Perhaps the adventurer who came to town would like to listen to the man's tale?
Poison can only ever be the tool of a murderer - as such, alchemists are tightly regulated by the Crown, and anyone found in posession of an unknown substance is forced to taste it themselves.