A young teacher arrives at Ranma High School. It is the principal who called her so that she gets rid of Ranma. Having a surprising power that allows her to absorb the energy of her opponents, she has the opportunity to defeat Ranma without getting tired. Happosai, her first victim, confesses to everyone a terrible secret: the girl who was her disciple once, she represents today a terrible threat. Ranma must therefore defeat her, but avoiding the frontal fight. Will he find a way out for the whole gang?