Ninjas are enduring, iconic figures of Japan. They were active about 500 years ago during the country's Warring States period. And these days, they're thought to be long gone. But centuries later, one ninja is still with us. 84-year-old Masaaki Hatsumi is a successor of the Togakure school. He teaches a supreme form of self-defense to more than 100,000 students around the world, including FBI agents and army personnel. Hatsumi can easily fend off attacks from these tough disciples and make them unmovable using just one finger. What is the essence of his astonishing art? This program investigates the hidden power of this ninja master.

Set in 1932, amid the rise of militarism after the establishment of the Manchukuo colony in Northeast China, the story centers on a trio of karateka. Studying under their aging master in a small dojo in the woods of central Kyushu, Choei, Taikan and Giryu face a company of kempeitai military police come to requisition their dojo for use as a military base.

High schooler Kei Tsuchiya joins The Destroyers when she decides that her longtime karate master is holding her back. She realizes her mistake but it's too late.

两百年前，空手道名家红次郎名震中外，他的黑带也成为至高无上的荣誉象征。时至今日，红氏传人红达也（中达也 饰）却遭到恶徒田川周（堀部圭亮 饰）的袭击，最终他身受重伤，小女儿菜月也被掳走。此去经年，长女彩夏（武田梨奈 饰）已出落成充满朝气的高中女孩，偶然机会她展露了自己的空手道技巧，而这条消息引起了田川的注意。 田川一直打着红次郎及其黑带的名头非法牟利，但是当年他被达也打致残废，所抢到的黑带也是冒牌货。为了防止彩夏拿出真正的黑带妨碍财路，他向手下发布了追杀令。在这一过程中，彩夏也将和久别的妹妹菜月（飞松阳菜 饰）重逢……