The Turtles discover for the first time that they are not the weirdest things in New York when they encounter two villains from the Hidden City pursing a cat-like agent. They have their first encounter with Baron Draxum who is making mutants with the help of his Oozesquitos.

Donnie creates new gear for his brothers in order for them to overcome their bad habits. However, the gear only becomes a nuisance as they fight mutated chef dubbed Meat Sweats, who plans to cook the turtles in order to gain their powers.

Mikey and Donnie try to get a Jupiter Jim moon buggy vehicle from a repo yard, where they run afoul of its owner Repo Mantis. In exchange for the prop vehicle, Mikey and Donnie are hired as repo men and are sent to repossess an RV on Long Island. However, the deal deteriorates when they meet the RV's possessor, a kind mutant named Todd Capybara, and his puppies.

When Donnie's newly-built Turtle Tank goes missing, he and the Turtles must find it. While going after some usual suspects, they are unaware that the Turtle Tank was taken by Splinter, who is additionally invited to "dinner" with Meat Sweats.

Longing for the excitements of hero life, Leo talks the team into tracking down the paper thief duo currently stalking the city. In doing so, the Turtles run into the Foot Clan, who use their mystic ability to create origami warriors from the stolen paper.

The Turtles have a hard time watching their skateboarding idol Sydney Allen on the "Extreme Skateboarding Finals" and stopping a burglary at Gilbert's Department Store conducted by the Foot Clan at the same time.