HH Holmes, the guy who helped spark the term serial killer in the USA along with turning his hotel into a home alone murder mansion is checked in on the condition he works as the building's maintenence foreman.
Alastor finds it hilarious because HH Holmes might have been an inspiration to him since his apprehension/crimes were turned into a radio pulp. Every time HH tries to build a normal room/fix, he starts to fantasize about Rube Goldberg murder traps while Alastor eggs him on as the narrator.
He finally gets to Angel Dusts room and while fixing it, spies on him from between the renovated walls. Angel Dust detects him, doing a strip tease trol. AD thinks he has power over HH, but cut to HH staring at the pole thinking of all the traps he could use for it, such as electrifying it.
After the strip tease AD gets bored and takes a shower while HH goes back to work. We cut to see that rat demon who stole ADs drugs creep into his room from the fire escape. He sees some of ADs babylace corset & bodice hanging on the wall along with some cash/drugs in the breast. As soon as he takes the money/drugs, a trap door appears and slides him down into the basement trash compactor. He screams on his way down which Angel responds by opening the right after the trap door hides itself.
We cut to the rat demon sliding down into the trash compactor while HH gets ready to turn it on. Alastor steps out of the shadows to egg him on one last time before Charlie's voice in the intercom praises him for his good work with a party. HH knows Alastor wants power over him so he begrudgingly turns off the compactor/trapdoor rig as the rat scurried away.
Alastor frowns as we cut to the party with a big cake that Angel Dust pops out of in his baby doll to seduce HH. While the party is ongoing we see the rat to break into ADs apartment again only to be zapped by a window trap. The drugs he stole explode into fireworks as everyone looks outside in awe and HH grins at the sight.