Break out! Power Girl joins the Holliday Girls in this action-packed "House of Brainiac" tie-in! Goblin and his goons may have the neighborhood, but they'll never break the spirit of our local hero and her new allies. With the biker gangs brawling, it's now up to Crush and Paige to shut the Czarnians down for good. Can the power of brains, brawn, and beauty prevail?