The gore-choked wastes of Avernus. the ground, brown, orange and red. Jagged rocks and corpses litter the wasteland from the constant battle that ensues here. Here and there are signs of civilization. Darkspine, a blackened city, once belonging to the outlands, it now resides on the top layer of Hell. The Pig and Poke is a barren tavern now run by a single woman, a Harvester Devil by the name of Jebelam. She wears flesh-like black robes though cut in all the right places to make it rather revealing.
The other patrons in the tavern are just an erinyes male and a figure in black with a hood drawn to conceal his face. Outside the windows the sky is black, rivers of blood flow past and fireballs collide with the ground at random. You are The Infernal Dictum, a law enforcement agency which down at it's core, is simply a inquisitorial mod squad used by Dispater to enforce his tyranny over all of Hell and bring down his rivals and enemies.
On Avernus you have been assigned to monitor a battle of the blood war which is raging near the Pig and Poke. The hellish forces consist mostly of Bel's armies but a few armies of both Mephistopheles and Baalzebuul are here aswell to aid the particularly vicious battle, Maladominaar and The Serpentine Order, respectively. Baalzebuul is the greatest enemy of both Mephistopheles and Dispater.
The main threat, however is the forces of the ruthless, walking engines of destruction, the Tanar'ri who will rest at nothing to rip you apart just for fun. Keep your eye out for them as much as you would your allies...