Ranma Saotome leads a hectic life as a boy who transforms into a girl when doused with water, constantly warding off overzealous admirers. Among them is the zealous Shampoo, a member of a Chinese Amazon tribe who initially sought to vanquish girl Ranma, only to be bested by boy Ranma and subsequently seek marriage with him as per her clan's tradition. The situation escalates when Shampoo undergoes a transformation after plunging into a cursed spring, turning into a feline! Matters become even more chaotic as Mousse, Shampoo's suitor, challenges Ranma in a duel for... Ranma's betrothed, Akane...?