Princess Linda, aka the world's most powerful superheroine, Lunagirl, was known for her warm-hearted nature. Only when faced with true evil did her protective instincts kick in to help the weak in need, and that's exactly what happened when she stopped the infamous gang and had them imprisoned. As fate would have it, the members of the gang ended up in Arkham Prison for Women, which was now functioning well under Harley Quinn's leadership. Here they learned that there exist many devices to pacify ANY superheroine. When they find out how sloppily "protected" the facility is, they decide to escape and take some sets with them, as they still have unfinished business with Lunagirl, who is invited to a special hotel... Will Princess Linda survive facing the greatest enemy she has ever met? Will her strength and wits along be enough?