Aya Iseshima's carefree existence takes a bone-crushingly violent turn when she wanders into the midst of a sadistic, girl-on-girl martial arts tournament. Her freshly-pressed school uniform doesn't stand a chance of surviving this pugilistic peep show, but Aya's outto prove that she can take a pounding just as well as the other knock outs in this clandestine competition. If she manages to survive a series of fabric-shredding fights with titillating teachers, sultry stewardesses, and mesmerizing maidens of the moe variety, Aya's every wish will be granted by a mysterious jewel known as the Platonic Heart. But if she goes down for the count, she'll join the growing ranks of brutally bruised -- yet resiliently buxom beauties that are never heard from again!