Earthquake of the Six Gates of Soukaiya has taken Yukano hostage, leaving Gendoso with his hands tied and putting the fate of Dragon Dojo on the line. But just when it seems like there’s no hope, a crimson shadow flips onto the scene with a karate shout that strikes fear into the hearts of enemy ninja!...

In the cyberpunk metropolis of Neo Saitama, Kenji Fujikido is an average salaryman whose wife and children are suddenly assassinated. Tracking the murder back to a ninja, Fujikido trains to seek vengeance - initially on those who murdered his family, but ultimately on every ninja on the planet....

In the cyberpunk metropolis of Neo Saitama, Kenji Fujikido is an average salaryman whose wife and children are suddenly assassinated. Tracking the murder back to a ninja, Fujikido trains to seek vengeance on those who murdered his family - but ultimately on every ninja on the planet....