Someone was murdered. A blacksmith who runs a shop nearby is asking for help figuring out what happened.
We find out that his name was Dimetrius
He was killed by The Unknowable One

Pattern on his skull seems like he was killed by an Ilithid.
Fourbeard is supposedly the last of the Illithid

Dimitrius was a member of the Adventuring Party the Eisvoli along with the previous prince of Bral, Calar

Who killed Dimetrius?
Why did they kill him?
Who else knows?

Who killed Calar?
Who has the proof of who the murderer is?