There has been a world disaster and the surviving cities’ buildings have been merged together creating an enclosed city with each level becoming a living, working tier, thus reverting to a class system similar to a passenger cruise-liner a hundred years ago. The populations are controlled by agents working for the president of that city and must carry an ID card, allowing them to pass between tiers, however not all can. Blacklits is the name of a dancers’ strip club located on the bottom tier known as the gutter of the city. Where the rich from above visit without been seen by their peers. In addition, where the women perform burlesque routines and private dances for the clients.