The Teenage Mutant Ninja Turtles pursue the evil cyborg genius Dr. WhereWhen through a time portal...and emerge in feudal Japan! There, they encounter Usagi Yojimbo, 20 years into the samurai's future but decades after the arrival of Dr. WhereWhen...who has already carved himself a fiefdom using mechanized clockwork samurai robots... intending to conquer current timelines!
