Under the city something waits in the dark. It feeds on waste, debris and weakness and casts an ink black reflection of the corruption in the Mayor's office. Fat Tony Marsland plans his Expo and ignores the coming pandemic whilst Jason, a powerless failure, deserted and almost broken, falls in love with Jenny. Jenny is a thief. In 1347 Jani Beg lays seige to the city of Caffa before commiting an act that will bring the black death to the rest of the world. You can't fight the Rat King, if you don't kill it you are it.