From the back of the book:
"All Good Intentions Aside...
It seems some scientists got themselves killed in Salt Lake City, the notorious City o' Gloom. That in itself's not too unusual, but these eggheads were working for the most powerful man in the state of Utah, Professor Darius Hellstromme himself!
It's up to the posse of heroes to figure out who killed the folks in the white labcoats before the local law starts meddling in Hellstromme's affairs. The good doctor can make it worth the heroes' while if they can do that and recover something stolen in the raid: a black diamond as big as a blacksmith's fist, the legendary Heart of Darkness.
But Hellstromme's only willing to pay up if he gets the rock back. You see, good intentions aren't worth all that much in the Weird West.
The Road to Hell is the first in the Devil's Tower trilogy of adventures, hurtling the heroes down a slippery path toward the damnation or salvation of the entire Weird West.
If the heroes fail, the world may literally never be the same."