The map design in the firehouse was where you have tables in the hallway, but they're on the wall tile rather than on the floor.
I did finish the black market quest and had him arrested, but didn't know where to go afterwards to save Minerva.
Viewing post in Juho's Firefighter Adventures jam comments
That part looks to me the same as it was in the sample map, so perhaps that is the creator's fault?
I gave the mayor and his wife dialogue that indicates the corn warehouse as a place worth checking, among other things. The warehouse is conveniently closed on Friday, though, so Saturday is the day to go.