During one of his rampages, Joker decides to Joker gas a restaurant full of people, killing everyone inside. Joker is then taken down by Batman and dragged back to Arkham.
However, one of the unlucky restaurant patrons happened to be Vanessa Fisk. Her husband, as you may guess, is not happy.
Does Kingpin have the resources and the clout to get revenge on Joker? More specifically, can Fisk get to Joker without attracting unwanted attention from Batman? And what happens if/when the Joker realizes Kingpin is after him?