
Mutant heroes live in New York sewers and train in martial arts to protect the city from crime.

A power surge causes the release of Tempestra, and it's up to Leonardo to stop her.

The Turtles must stop Dregg's Techno Gang from stealing a proton accelerator; Dregg has some truly sinister plans for it.

Splinter disappears, and a note left behind forces the Turtles to go their separate ways.

Dregg hires an alien bounty hunter named Medusa to put the Turtles into captivity.