Born in Kashima, a mecca for swordsmen, during the Warring States period, Tsukahara Bokuden was a legendary swordsman who learned the Kashima Chugoku school of swordsmanship from an early age, set out on a journey to train as a warrior at the age of seventeen, and participated in countless battles and serious sword fights throughout his life without ever being injured. This period drama delves into the mysterious true character of this master swordsman.