"After Batman took the blame for murders committed by Harvey Dent to keep alive hopes for Gotham City, Commisioner James Gordon is forced to hunt his friend under pressure from the new Mayor and the Police. Whilst occupied with staying one step ahead of the police, a new riddle filled force arrives udetected in Gotham City to play a whole new set of games for Batman."
Batman is on patrol in Gotham City tackling a drug shipment coming into the city. He foils most of men but one gets away with the shipment which Batman tracks through the city. He stops him in downtown but is then ambushed by the police with the drug being a rouse to capture Batman by Gordon. Batman evades capture and heads back to the batcave but is suddenly knocked off the batpod by a suspended wire. A girl dressed in slimlime black then gets on the batpod and drives off, dropping a valuable stolen diamond necklace which he takes. Batman has to walk back to the batcave where he is greeted by Alfred.
Bruce goes to Wayne Industries the next day to talk to Lucuis who is interviewing a new employee, actually Edward Nigma. Bruce tells Lucuis that he needs another set of wheels as the Batpod was stolen, much to Fox's sarcastic surprise. He offers Bruce another prototype of a military vehicle, based on sports car built for Urban warfar which he nicknames the "Batmobile", to which Bruce smiles.
James Gordon is holding a meeting with high ranking Police Detectives wanting information on the new man leading Maroni's mob. One officer says he is the son of Chesterfield and Barbora Cobblepot who were close friends of the Wayne's but were murdered when the boy was 14. He also says that rumour is he killed Alberto Falcone using his pet penguins hench his nickname "Penguin". Gordon says that he wants to lower mob level again to the same level before the Joker catastrophy starting with the Penguins mob.
The Penguin is meeting with Gambol recently released from Blackgate Prison on mob boudaries within the city. Gambol threatens Penguin who is insulting the other mob bosses but Penguin says that he is going to run this city and unless he wants to get on the wrong side of his pets, he should fall in line. Gambol says he doesn't negogiate with small fat bird freaks and he has declared war. As gambol leaves, the sleek black wearing woman enters and sits down with Penguin who addresses her as "Catty". She puts the bag on the table and Penguin begins looking through the many jewels taking out 2 pieces and putting them in a box next to him filled with other jewels. He then pays her for the jewels but she argues that they are worth more and he doesn't want to be on the wrong side of her claws. He then gives her more money and tells her that he wants her to rob Wayne Enterprises for a valuable heirloom located in main conference hall.
Bruce and Alfred are on their way home as Bruce notices down a side alley the woman on the Batpod and tells Alfred to follow her. They follow her to an apartment before driving back to Wayne Manor. Bruce goes down to the batcave and changes to Batman and takes out the new car. Batman waits for her to appear and just as she does, a young girl is attack by a group of men who Batman chooses to save before going after the woman. The woman gets away heading for Wayne Enterprises with Batman in hot pursuit. When the woman realises, she detours through the alleys and side walks trying to get away with Batman shooting a tracker onto the Batpod before letting her get away. The woman then arrives at Wayne Enterprises using suckers to climb up the side of the building as Batman watches from the opposite building. As she reaches the main conference floor, she cuts a hole in the window with one of her claws and climbs through as Batman flies in and tackles her. She tries to reason with Batman at first apologising for taking his bike and says he can have it back. Batman asks her why she is breaking into a conference room but she says that its none of his business and the 2 egange each other with them both pretty evenly matched with Batman avoiding punching her. As they both grab each other, the woman kisses Batman who pushes her and she falls out of the window to which Batman jumps after her grabbing her and grappling to a side building. She then thanks him and kisses him again before kicking him down and getting away.
Meanwhile, Edward Nigma is sat in his apartment surrounded by newspaper clipping of Batman and also some of his more high profile villains such as Joker, Scarecrow, Rha's Al Ghul and Killer Croc and is making a riddle exposing Harvey Dent for being the murdering vigilante that is to be published in tomorrow' Gotham Time's, under the name Edward Nashton.
Bruce is driving his lamborghini to Wayne enterprises and is greeted at the front door by Jeffrey the vallet who gives him a newspaper and parks his car. He begins reading the paper and notices the article about Harvey Dent which takes his interest as well as an article about the "Catwoman" when he bumps into a blonde woman entering the lift. He introduces himself and apologises to which the woman complies introducing herself as Selina Kyle and his new Personal Assistant. He asks what happened to Jessica his normal PA and she says she had a scratchy throat and was replaced before leaving the lift leaving Bruce smitten.
Gordon is meeting with the Mayor on the article Nashton wrote. The Mayor tells Gordon that he heard rumours that Dent went vigilante but this was denied by Gotham PD, but Gordon admits that Dent did actually go rogue and it was agreed that Batman would take the blame to keep hope up in Gotham. The Mayor also tells Gordon that the increasingly powerful Penguin is becoming more influential and corrupting the Police that Gordon worked so hard to keep clean.
Bruce comes out of his office and tries to entice Selina, but she refuses saying their relationship is strictly professional teasing Bruce to his shocked annoyance but when she realises that to stay behind undetected to steal the heirloom, she kisses Bruce and they sleep together in Bruce's office bed. The security guard comes in and interrupts them and leaves them to before locking the doors for the night. Selina awakes and gets into her costume and steals the heirloom from the conference room before making an escape knocking out the security guards. Bruce awakes to the sound of the alarms and realises that Catwoman and Selina are one and the same, going to the conference room to see the missing heirloom. He then goes to his office using a secret passage to a room with a spare Batsuit and gadgets. He then tracks Catwoman through the city to the former restaurant of Carmine Falcone where Bruce met with him the night he left Gotham. He uses infared scope to look inside to see Catwoman selling the heirloom to Penguin. Batman then flies down onto the roof, breaking through the glass window and taking down the numerus henchman whilst Catwoman escapes with the heirloom. Batman knocks down Penguin before noticing Catwoman escaping but is occupied with the henchman. The Penguin offers Batman a truce before walking and picking up his umbrella but Batman refuses saying he has evidence on Penguin that will put him away at Blackgate to live with his penguins forever. Penguin offers Batman that same chance and presses a button and reveal Batman sat on top of a trap door dropping him into a underground pool filled with Penguin's killer penguins. Batman leaves grenades floating on the pool surface and grapples to the ceiling blowing up the Penguins before swimming under the water to find a seage system leading out to the canal.
As Batman makes it back to his batmobile, he notices a riddle placed on his car which he reads. It explains that "the Riddler" has captured his girlfriend Catwoman and if Batman wishes to save her, he must follow the riddles.
As Penguin and his henchman laugh at their believed demise of Batman, there is a knock at the door which is opened to reveal an identical riddle. Penguin reads it which reveals that the Riddler has possession of his heirloom and to win it back, he must follow the riddles or lose the heirloom.
Bruce, Lucuis and Alfred are at Wayne Manor figuring out the riddles, whilst Penguin has a search out for the Riddler.
Bruce, Lucuis and Alfred put the puzzle together and realise the next clue is at the site of Harvey Dent's death. Batman arrives and trips a wire whilst approaching the next riddle which triggers causes the body of a dead man to drop on top of Batman just as Harvey Dent fell to his death. Batman goes to move the body but it is helped off by James Gordon who also says he received a Riddle. They both read the next riddle which explains that the next riddle is at the site where Harvey Dent killed Sal Maroni. They both arrive their in the Batmobile and read the next clue which leads them to the a riddle at the site of every murder Harvey Dent committed before reaching the real clue. Just as they read it, douzens of reporters and photographers arrive photographing Batman and the police working together.
Catwoman is tied up to a chair that is perfectly balanced ontop of another set of chair legs with a wire attached to each leg connected to a bomb on the top floor of Wayne Enterprises. She awakes and struggles lose before noticing the bomb.
As Batman and Gordon are surrounded by reporters, Batman prepares to leave before noticing Edward Nigma, posing as reporter Edward Nashton the author of the article exposing Dent's crimes. Batman punches Nigma and carries him off before grappling away. Batman takes him to the batcave and interrigates Nigma who predicted this and offers Batman another riddle to the location of Catwoman. Batman takes it and tranqs Nigma before droppig him outside the police station with a message to Gordon. Batman arrives at the location just as Penguin and his mob arrive who begin shooting at Batman. Batman then goes into stealth mode taking out Penguins mob leaving only Penguin who uses opens his umbrella which is revealed to be a machine gun. He then manages to shoot Batman injuring him in right arm before Batman tells him they have both been set up.
Nigma goes back to Wayne Enterprises now dressed in a green suit and hat and black face paint actig as a mask. He starts the bomb underneath Catwoman removing her mask before drawing a question mark on her face leaving 15 minutes. He then goes to the advanced science department of the building revealing he has rebuilt the machine that Batman and Lucuis used in TDK but to hack into every TV station, radio and cell phone. The Riddler then broadcasts that he has caught the notorius theif "Catwoman" and that he has taken matters into his own hands and put a bomb under her that will blow her up in 15 minutes and that he is confirming that Harvey Dent is a murderer. He then leaves a riddle as to why he is so bothered along with the phrase "Why so serious" implying he is in league with the Joker.
Batman is contacted by Lucuis who tells that Nigma and Selina are at Wayne Enterprises and is using the machine that he built. Penguin and his "crack team" arrive at Wayne enterprises after having a tip off and begin searching the building for Penguin's family heirloom. Batman crashes through the window and is attacked by Penguin's men who he quickly disposes of. He then makes it to the top floor and is confronted by a riddle of how to stop the bomb. He makes it through the first trap laid and the second before being presented with a keypad and a phone. He picks up the phone and dials out to Jim Gordon with Batman wondering why it dialled out to him. He tells him that Batman told him he wanted the cell number for the Joker for the code but Batman says it wasn't him. With only 12 seconds left, Batman uses the cell number as the code and it stops the bomb.
A cell at Arkham Asylum down a dark corridor flings open with the same cell number on the door.
Batman helps Selina off of the chair.
The Riddler meets up with a woman dressed as a harlequin jester outside Akham Asylum. She gives him a package containing $1,000,000 and says that Joker will be pleased with Harley.
The Joker, in a straight jacket emerges from his cell laughing wakling into the dark corridor.
Whilst Selina is recovering her composure, Batman says he must take the bomb for safety before Selina kisses hm and Batman kisses her back. She then slaps him round the face and says she is stil a thief before stealing his gapple gun and jumping out of the window. Batman then smiles before getting a call from Gordon saying that the Joker has escaped from Arkhum and Batman says he will get right on it.