It all started with a cannister of alien oozey slimey stuff and four pet turtles. Somehow, accidentally, the turtles take a bath in this unidentified, glowing green guck and they begin to grow, change and mutate. The series takes place of the battlefield of the New York City sewers. The teenage turtles are raised by their sensei called Master Splinter. He trains the turtles in the ancient martial art, Ninjtsui. They learn the ultimate skills in stealth, fighting and weapons.

Our four heros are Leonardo, Raphael, Michelangelo and Donatello. We each have our favorite turtle. Splinter has forged these turtles into a mean, green fighting machine. There are other ninjas out there they need to be taught a lesson. The evil ninjas are called the Foot Ninjas. These guys are highly trained also by all for the evil goals of the powerful and deadly Oroku Saki or the Shredder. You know how he got his name by looking at his multi-bladed battle armor.

These two teams working the classic division between good and evil, are on a constant collision course.