Penguin schemes to marry Barbara Gordon in order to become Commissioner Gordon's son-in-law and thereby exempt from the law. But the commissioner's daughter turns out to be a third secret crime-fighter called Batgirl and only Alfred knows her true identity.

Siren gets Commissioner Gordon under her spell and then goes after Bruce Wayne, whom she directs to give her the Wayne family fortune and jump from a skyscraper. Her hope is that Batman will come to Bruce's rescue, so she can enslave him and discover his secret identity.