It seems a new hero has arrived in Gotham, but as the title suggests, it is a mystery to even Batman who this new Batwoman actually is. As the plot thickens, so does the mystery as Batman must figure out who Batwoman is and to stop familiar enemies Penguin and Rupert Thorne from selling illegal weapons to the fictional nation of Kasnia. At the beginning of the story, they employ Carlton Duquesne, a gangster, to provide protection and muscle. Bane also comes into the plot as a hired hitman to take out any person or persons in the way of business.