Step into an alternate 1936 where the line between mad science and black magic has completely dissolved, plunging the globe into a cold shadow-war of dieselpunk paranoia and bio-mechanical horror. In this volatile world, nations fuel their war machines not with oil, but with glowing blue Aetherium—a volatile, mercury-like substance transmuted from scavenged radium and harnessed through clicking analog relays and pulsing, jar-bound biological processors. As the terrifying cults of the Black Sun and Nachtwölfe race to force human evolution by splicing Martian residue into monstrous Grey-Human hybrids, Allied Occult Intelligence agents fight a desperate rearguard action amid the poison-choked alleyways of London’s fog-wrecks and the covert Alpine laboratories of Central Europe. Steel yourself, fuel your gear, and trust no one: the geopolitical powder keg is about to detonate, and humanity’s ultimate fate will be forged in the glowing, mutated embers of a dark new age.