I'm getting ahead of the story here, but after Kevin is created, and the first fire golem "hops" away; Duncan, Karp, and Kevin turn back to find the village now in ruins, so they set off to find the Count of Tuscany who has the power to restore the village and set things right.
Once the quest begins and they are on their journey, Karp and Kevin are quickly seduced by a couple of sirens and tell Duncan they will catch up with him later, while they stay to get their freak on for a while.
So Duncan now has to continue on the quest for now alone, but undaunted.