This is a model sheet of Batgirl by the great José Luis García López for the 1982 DC Comics Style Guide. Batgirl is in reality librarian and congresswoman Barbara Gordon, daughter of Gotham's Police Comissioner Jim Gordon. Since she was a little girl, Barbara wanted to be something special, something more; and after a fateful meeting with Superboy, she realized that she wanted to be a super hero.
Years later, Bruce Wayne was kidnapped by the villain Killer Moth; and Barbara, who was wearing a female Batman uniform for a costume party, decided to jump into action and rescue him. That night she became the great Batgirl. Eventually she gained the confidence and trust of Batman, who allowed her to operate in Gotham and become one of his most reliable, resourceful, and valuable operatives.