Nora Clavicle made Mayor Linseed make her the new police commissioner after charming his wife and replaced all the policemen with women who were housewives. This resulted in the women being more interested in sales and swapping recipies than catching criminals. Nora sent her agents to rob a bank to lure Batman, Robin, and Bat Girl into a trap so they wouldn't interfere with her scheme.
Nora was planning to destroy Gotham City so she would collect the $10,000,000 on it from an insurance policy. Nora sent an army of mechanic mice with bombs to blow up Gotham City and the new police force were terrified by the mice. Batman, Robin, and Bat Girl lured the mice to the docks and foiled her plans.
James Gordon, Clancy O'Hara, and Alfred were able to capture Nora and her associates while having the authority to hold a citizens' arrest.