Tucker and Esther Cobblepot, an aristocratic couple, are horrified to discover that their deformed infant son has killed their pet cat. Believing that Gotham's elite would never accept him, they abandon him in the sewers. Fortunately, a colony of penguins finds and raises him. Fast forward 33 years, and this abandoned child has transformed into the notorious criminal known as Penguin, portrayed by Danny DeVito.
In his quest for acceptance and power, Penguin kidnaps businessman Max Shreck, coercing him into helping secure his citizenship in Gotham City by leveraging incriminating corporate evidence against him. Meanwhile, Shreck's secretary, Selina Kyle, uncovers his nefarious plan to construct a power plant that would drain Gotham's electricity. In a desperate move, Max attempts to silence her by pushing her out of a window. Miraculously, she is revived by a group of alley cats and, after a mental breakdown, crafts a black vinyl catsuit, embracing her new identity as Catwoman, played by Michelle Pfeiffer.
To bolster his reputation, Penguin stages a heroic rescue of the mayor's baby, aiming to sway public opinion in his favor. However, Bruce Wayne, depicted by Michael Keaton, becomes wary of Penguin’s true intentions and soon discovers that he leads the Red Triangle Circus Gang, a group notorious for their crimes in Gotham. Taking on the mantle of Batman, Bruce is determined to protect the city from this chaos.
As events unfold, Penguin learns of his parents' demise and takes on life as Oswald Cobblepot while plotting to become mayor. To discredit the existing mayor who opposes Shreck's power plant, he orchestrates a riot with the help of the Red Triangle Circus Gang, but Batman intervenes. During the chaos, Catwoman seeks revenge on Max by vandalizing his department store. A confrontation occurs between Batman and Penguin but Catwoman interrupts, leading to an explosive escape for Penguin.
As the story progresses, Catwoman and Penguin devise an evil plan to eliminate Batman. At the same time, Bruce and Selina indulge in a budding romantic relationship. Their schemes culminate in the kidnapping of the Ice Princess, the actress chosen to activate the Gotham City Christmas Tree lights, making it appear as though Batman is responsible for her disappearance. In a tense moment, Catwoman's rejection prompts Penguin to turn on her, and in the ensuing chaos, Batman discovers that Penguin has taken control of his Batmobile, creating havoc throughout the city until he regains command.
Determined to reveal Penguin's villainy, Batman broadcasts a recording of Penguin's malevolent plans during his election speech, rallying the public against him. In a twisted retaliatory act, Penguin kidnaps Gotham's first-born sons, including Max. Batman heroically rescues the children, forcing Penguin to implement an alternate scheme to obliterate the city with his army of penguins. In a climactic showdown, Batman manages to thwart this plan, confronting Penguin before pushing him into sewer water.
Catwoman confronts Max for a final time, and after a dramatic exchange, he shoots her, leaving her with only two of her nine lives remaining. In a fierce turn, she kisses Max with an electrical taser between them, resulting in his explosive demise. Batman searches for Selina but finds no trace of her body.
As the story concludes, Penguin emerges from the sewers but succumbs to his injuries, his body dragged away by his emperor penguins. Bruce, accompanied by his faithful butler Alfred, heads home only to glimpse Selina's shadow in an alley, discovering her beloved cat, Miss Kitty. He takes the cat as a keepsake while sharing Christmas wishes with Alfred. Ultimately, the Batsignal ignites in the night sky, and Catwoman rises, affirming her survival and leaving the door open for future encounters.
