Instead of one main story this is really 5 separate stories about different villains. Joker, penguin, poison ivy, scarecrow and two-face.
As with most batman books these stories try to deliver more than just superhero action, but a glimpse into the souls of each books main character. Some of the stories are better than others, but none of them are bad. I would recommend this to anyone who enjoys the bad guys in gotham city,but if your out and out batman fan he isnt involved in this one much.