Full of self doubt, Leonardo leaves the team. Michelangelo, Raphael, and Donatello all take turns being leader as they try to figure out why the sun is getting smaller.

Shredder programs the city's new garbage collecting super-computer to collect the Turtles. But when Shredder doesn't specify 'Ninja' Turtles, the super-computer collects them all! Turtles of the city of every shape and size are not safe.