Heavily inspired by Bioschock Infinite, Columbia is a steampunk floating city suspended in the air through a combination of giant blimps, balloons, reactors, propellers and mainly quantum levitation. Columbia is a place of few rules or laws. Provided you are rich. The lower classes are oppressed, poorly paid if at all and trod upon by the upper classes and viewed as nothing but slave labor or worse. The upper and middles classes are strictly enforced and separated by the government by law with the lower classes mainly being indentured servants, laborers and even salves. Or worse, secretly shuffled off during the night to a hidden lab to be an experiment.
For all its owner, tech and beauty, Columbia is a false utopia. There is a revolt in the stirring in the oppressed masses, a made scientist paying lowly grunts to snatch people to turn them into monstrous things or preform unspeakable experiments on them, the upper class want to hold onto thier power and continue to oppress the lower classes and there is something dark brewing in the shadows
Slavery of the lower classes is legal and having a house hold 'pet' is considered to be fashionable.