On the other side of the Aether is a dirty and dangerous London filled with marvelous steam-powered machines and magic.

Detective "Dolly" Williamson's job is to keep the cesspool from growing bigger. He loves when he just gets a simple murder. Follow the clues, catch the culprit. One man's way to shrink the stink of the streets. 

That won't happen this Sunday morning.

On this Sunday he is called to the poshest part of London to the swanky home of Sir Francis Chilton. The head of a prestigious merchant bank lending to the Kings, Queens and the mechanists of Europe. 

Upon the Detective seeing the corpse, he knew he would need the help of Sister Rose Caldwell, the White Witch of London. 

Chilton wouldn't spit on Rose Caldwell if she were on fire, but if anyone is going to figure out who turned Chilton into a crispy corpse, it will be the metaphysicist, Rose Caldwell.

The case takes a turn when France's death cult shows up, and Dolly is forced to work with the Necronists. They know who the murder is and are hell-bent on bringing the suspect back to France. Dolly suspects they want to find the murderer for other reasons than justice.

More of London's well to do are turned into lifeless husks while Rose and Dolly put the pieces together. The race is on to find the murderer before the Necronsits can do the same. The bloody trail leads to a shocking family secret. This secret won't die and has come back to haunt all those who took part in the cover-up.