Charles the Pudding the 13th has earned his nickname — his castle, known throughout the land as Monster Paradise, is stuffed with treasure and guarded by creatures that have no intention of letting anyone walk out rich. Undeterred, a band of treasure hunters steps up to the challenge. Kaibutsu Para-Dice plays as a board game, with four characters to choose from — three male and one female — each making their way through the monster-filled halls of Charles's fortress in pursuit of whatever riches can be found inside.