When a scientist accidentally unleashes a super-powered Nanotech monster with a childlike mind, it adopts a small-time thief as its father figure, and the mayhem begins! Their crime spree targets April's new antique shop, and the Turtles come to her rescue. But how do you stop something that rebuilds itself as fast as you bash it apart? It's a question the Turtles better answer fast, cause the Nano-matic slices, it dices, and it purees turtle soup in seconds!

After Casey Jones makes himself an unwanted guest in the Turtles' lair, Raphael takes him topside for a "breath of fresh air," where they encounter the Foot Tech Ninjas - enhanced soldiers able to turn themselves invisible. Raph is caught and interrogated, but Casey manages to slip away and warn the others. Raph escapes his captors but, unbeknownst to him, is tailed by a squad of cloaked Foot Tech Ninjas. Will Casey and the others get to Raph in time before he leads the Foot directly to the Turtles' lair?