When the Dynamic Duo realizes Ma Parker has seized control of the Gotham Penitentiary, they must get in to stop her.
Now in charge of the Gotham State Pen, Ma Parker and her jailhouse full of criminal cohorts use it as their base of operations. No one suspects jailed prisoners of the crimes, but a clue picked up by Batman and Robin may lead them right to Ma's whereabouts.—Twenty Penguins