In Isgard, where steam and soot obscure the sky, magic is a taboo monopolized by the church, and the people at the bottom can only survive between gears and wastewater. Kyle is a money-hungry black market appraiser in Lower City who makes a living by reselling the remains of inferior magic weapons. One rainy night, the dying smuggler broke open his shop door and forced a bloody brass cylinder into him. There were no valuable antiques inside, just a bone fragment engraved with a map of the city's foundation. The church's "White Crow" heresy inquisitor heard the news, and Kyle was forced into a conspiracy that could overturn the entire city. In order to survive, he could only take this hot secret with him and step into the darkest abyss of Ember City.