The episode opens with Mr. Nesmith trying to fix Jimmy Neutron's rocket so both him and Sheen can return home to Earth. He tries to get Sheen to help him, but soon realizes that if they want to get off of Planet Zeenu, he will have to make it happen himself.
They are interrupted by Aseefa, who comes charging in with her pet chocktow, Chock Chock. Aseefa needs a sitter for him for the day while she tends to some business and asks Sheen if he will do it. He, of course, agrees, but Aseefa warns him that the chocktow cannot be seen in public and must be kept indoors at all times. If he is caught by Animal Control, she may never see him again. Sheen reassures her that he can do the job, and Aseefa leaves Chock Chock with him for the rest of the day.
Chock Chock makes a mess of Sheen's house, so Sheen decides to let him out against Aseefa's wishes. He plays fetch with him with a stick, but throws it all the way over into a cage Animal Control has outside of the building. The chocktow then runs into the cage to catch the stick when the door locks behind him.
It is up to Sheen, Nesmith, and Doppy to save him. Nesmith comes up with a diversion to distract the guards by dressing as a female and serving food, while Sheen and Doppy get into the cage dressed up in a chocktow costume. Once the guards are distracted, they get out of the costume and instruct Chock Chock to dig a hole that will get them back to Sheen's home.
Everyone makes it back in the nick of time. Aseefa arrives and is pleased with how Sheen cared for her pet. Doppy, who is not wearing chocktow repellent, has the other animals confused into thinking he is a dropping. They come out of the woodwork in search of him so they can bury him. Aseefa, Sheen, and Nesmith run into Sheen's house while Doppy is left to deal with the other creatures himself.