Wild Cardz, is about four women: Coco Hearts, Jo Diamonds, Casa Clubs, and Sunday Spades, who are Crown Knights, protectors of the Card Kingdom. One day, a large white pawn begins to hover mindlessly through the Card Kingdom and destroys everything in its path. The Crown Knights are called to stop the pawn, even though nobody really knows how. Later on, the pawn upgrades to a knight, and black chess pieces begin to enter the fray.