Somebody made a mistake.

Somehow, you're not the only Master Architect they hired for the job... and magical contracts being what they are, they can't unhire anybody. That means there will be other Master Architects poking around, competing for precious resources, hogging up the best building locations, and generally getting in your way as much as possible.

You've got 3 Dwarves, 3 Elves, no Gnomes, a handful of supplies, and 7 months to prove that you're the best builder in Belfort. Now get out there and win.