Slippery sewer pipes make a brutal place for a fight -- but that won't stop Jonah Hex and Amadeus Arkham from facing off against a gang of kidnappers beneath Gotham City. And when the thugs get the best of them, Hex and Arkham find themselves swept away to a pitch-black cave with seemingly no way out -- and lots of bats! Will they find a way to escape Gotham City's dark underbelly before Hex's matches are all burned out? Also: For the Barbary Ghost, death is only the beginning of her plan for revenge!