A quartet of humanoid turtles, trained by their mentor in ninjitsu, must learn to work together to face the menace of Shredder and the Foot Clan.
The Turtles and the Shredder battle once again, this time for the last cannister of the ooze that created the Turtles, which Shredder wants to create an army of new mutants.
The four turtles travel back in time to the days of the legendary and deadly samurai in ancient Japan, where they train to perfect the art of becoming one. The turtles also assist a small village in an uprising.
After some violent confrontations with his new classmates, Daniel LaRusso learns karate from Japanese handyman Mr. Miyagi, in order to defend himself.
Despondent over the closing of his karate school, Cobra Kai teacher John Kreese joins a ruthless businessman and martial artist to get revenge on Daniel and Mr. Miyagi.
A young Asian American martial artist is forced to participate in a brutal formal street-fight competition.