The Joker and the Penguin break out of Arkham Asylum and race each other to find a stash of stolen money hidden within a crypt in Gotham Cemetery after an inmate, who had hidden it, told them about it. The Joker is quickly intercepted by the Batman and is electrocuted when he falls into a river by his super-charged joy buzzers while the Penguin takes the opportunity to enter the cemetery himself. While searching through a crypt, the Penguin accidentally cuts his hand while using his umbrella-sword to open a coffin he hopes contains the money, finding a body instead. Blood from his hand drips on the corpse's heart, which brings it to life; it is none other than the vampire lord Count Dracula, his body having been moved from Transylvania to Gotham City after his "death." After attacking and turning a watchman at the cemetery into a vampire, Dracula hypnotizes the Penguin into becoming his non-vampiric servant so that he may lead him through Gotham to feed and guard his coffin during the day while he regains his strength.
News of The Joker's death during the events of City of Scars results in a riot at Arkham Asylum. Batman races to rescue Nightwing, who has been abducted by Poison Ivy and Killer Croc.
Cela fait cinq ans que tout était génial et les citoyens font face à une nouvelle menace énorme : les Duplo envahissent l'espace, détruisant tout plus vite qu'ils ne peuvent reconstruire.
When Batman (West) and Robin (Ward) get a tip that Commodore Schmidlapp (Reginald Denny) is in danger aboard his yacht, they launch a rescue mission using the batcopter. As Batman descends on the bat-ladder to land on the yacht it suddenly vanishes beneath him. He rises out of the sea with a shark attacking his leg. After Batman dislodges it with bat-shark repellant, the shark explodes. Batman and Robin head back to Commissioner Gordon's office, where they deduce that the tip was a set-up by the United Underworld, a gathering of four of the most powerful villains in Gotham City (Joker, Penguin, Riddler and Catwoman).
Bruce Wayne and Lex Luthor are both nominated for the Man of the Year award, and Wayne wins. As he is making his speech, the Joker breaks in with the Riddler, Harley Quinn, the Penguin, Two-Face, Poison Ivy, Bane, Catwoman, and steals the award, as well as money and gems. Batman arrives and stops everyone except the Joker, who escapes on his boat, but Robin's helicopter picks up Batman. When the rope holding Batman is broken, he calls in the Batwing and defeats the Joker. Meanwhile, Luthor is running for president, but his poll figures are terrible. He learns that the Joker knows how to produce more Kryptonite, and can make a gas that makes people love him, which will help Luthor win the election and defeat Superman. He breaks the Joker out of Arkham Asylum and promises him the use of Luthor's De-Constructor weapon to defeat Batman by dismantling all his gadgets and vehicles.
Gotham City-based vigilante Batman travels to Metropolis to preemptively combat Superman, fearing what would happen if the latter is kept unchecked, while another threat endangers humankind.
Adam West and Burt Ward go in search of the Batmobile after it is stolen, and along the way find themselves forced to consult their memories to decipher clues left by the criminals, evidently people they had known from filming the Batman television series. Memories include affairs, one of which led to Burt being chased by a knife-bearing lover, medicine Burt was forced to take so his genitals would not be so visible in his tights, and Adam meeting the actress who played Batgirl (Yvonne Craig) and accidentally placing a hand on her breast during filming. As it turns out, the villains who stole the Batmobile were the actors who once played the Riddler (Frank Gorshin) and Catwoman (Julie Newmar).
Robin is waiting for a big date in a restaurant. Unfortunately, Batman (who Robin desperately tries to convince not to show up, as he'll ruin everything) shows up. Batman appoints himself as the wingman of the date to help the poor Boy Wonder "score". Kate, his date, arrives at the restaurant shortly after Batman, and the Dark Knight becomes incredibly obnoxious toward her, dominating the conversation and flirting. He even tells her about when Robin was captured by the Penguin.
Barbara Gordon traque les criminels de Gotham City dans le costume de Batgirl. Une nuit, elle tente d'arrêter des braqueurs seule mais échoue ; Batman intervient et capture l'un des voleurs en fuite. Les deux justiciers identifient l'organisateur : Paris Franz, neveu du parrain du crime Lord Francesco, qu'il souhaite évincer pour prendre sa place, et qui commence à être obsédée par Batgirl. Batman demande à sa protégée de le laisser faire mais elle refuse. Quand Franz piège Batgirl en la menant vers le cadavre de Francesco, Batman lui interdit de s'impliquer dans l'affaire. Furieuse, Batgirl commence à frapper Batman et le plaque au sol avant de l'embrasser, puis ils couchent ensemble. La nuit sème la confusion dans la relation entre Batman et Batgirl. Franz se manifeste à nouveau, piégeant Batman, et Batgirl intervient mais manque de le tuer. Barbara se rend compte que Batman avait raison et abandonne son costume.
It is New Year's Eve, and Bruce Wayne is hosting a party at Wayne Manor. Just when he meets "Miss Kitka" (Catwoman in disguise, as seen in the 1966 film Batman: The Movie), he gets a call from Commissioner Gordon, explaining that the Joker is planning a New Year's Eve crime spree (the concept of the Joker planning a crime for midnight on New Year's Eve also appears in Batman: The Long Halloween).
Crime is on the run as the newly formed Justice League keeps Metropolis safe and this makes evil genius Lex Luthor very unhappy. Together with Black Manta, Sinestro and a gang of ruthless recruits, Lex builds his own league and declares them the Legion of Doom.
Batman, Robin and Nightwing investigate a string of incidents where a mysterious assailant has been taking down numerous crime organizations all over Gotham City. In their findings, they discover that while the thugs were taken down and no cash was stolen in the crime scenes, The Riddler and The Scarecrow have been lethally drugged with a botanical neurotoxin found only in the Far East. Moreover, blood splatters in the crime scenes indicate that the assailant was reckless, not caring about sustaining gunshot wounds during the fights while drugging the villains. Batman concludes that the assailant is Batgirl, who is being manipulated by Poison Ivy; the gunshot wounds she sustained were her failed attempts at breaking the spell. Batman and Robin confront Poison Ivy, who attempts to kill Batman with a lethal dose of the neurotoxin. An injured Batgirl, however, briefly breaks Poison Ivy's spell on her to block the shot as the villainess makes her escape and Nightwing rushes to the scene with the antidote.