A master of the mysterious martial arts of Battle Shogi seeks out Genma, demanding a rematch for the defeat that cost him the respect of his wife. When Genma cunningly wins again, the man decides to turn the entire lawn into a gigantic shogi board.

A French nobleman named Picolet Chardin comes to Soun and Genma to collect on an old debt, demanding 1 of their daughters as a bride. Having been beaten by him at battle dining martial arts previously, Ranma volunteers, hoping for a chance to get even.