Byakuro and Kabusu, two ninja clans in feudal Japan, engaged in a fierce war. One fateful night, Kabusu launched a brutal raid on Byakuro castle with the intention of abducting the infant princess of the rival clan. However, one devoted Byakuro ninja thwarted their plan and whisked the princess away to safety. Over the years, he trained her to become a skilled ninja. Later, six aspiring ninjas were tasked with a mission to infiltrate the Kabusu-controlled Byakuro castle and retrieve a sacred scroll to complete their training. However, their mission became exceedingly difficult when, in a confrontation with three Kabusu members who had dark magical powers, they found out that one of the trainees was actually the kidnapped princess.