A four-years old Scott Jones arrive downstairs for breakfast and find his mother cooking and serves them oatmeal for breakfast, which Scott refuse to eat. It is at this point that Naomy realizes that her husband has been letting their son eat junk food, disregarding his health. When David Jones gets back from the work, Naomy instructs him to make sure their son eats the nutritious meals she has prepared for him in the fridge which Jones determinedly kept the promises his wife made. As before Scott refuse to eat the meals Naomy and Jones has prepared, and decide to go on a hunger strike. Even Uncle Grandpa shows disgust towards healthy food. During dinnertime, Scott doesn't want to eat his spinach, so he throws it away, leaving Uncle Grandpa to vaporize it, but when he asks for dessert, his mom gives him carrot cake--without the cake, because Jones says that carrot cake minus cake is healthy for their colons. Scott then goes to Toriko's house for dinner but discovers that for dessert, they read math books. Scott tries yet again at Uncle Grandpa's place, thinking it would be a better option since he is from uncle and grandpa and everything is backwards, so they would serve dessert first. However, since everything is backwards, it turns out the they eat vegetables for dessert.
After his failed attempts for sweets, Scott gets fed up and desires for no breakfast, lunch, or dinner; just desserts. Uncle Grandpa tries to explain that eating healthy gives one the energy to perform tasks, but Scott then exploits Uncle Grandpa's weakness for sweets by talking about junk foods, making him go nuts and beg Scott to make the wish. Not usually the skeptical one, Mr. Gus tries to explain what happens to Uncle Grandpa if he consumes too much sugar, but Uncle Grandpa puts him in a bubble before he could say what would happen, so Uncle Grandpa keep the promise that Scott made. When Jones comes home for lunch and finds that none of them are even trying to eat healthy, he decides to ban all junk food in the house. Jones confiscates Uncle Grandpa's hidden stash and takes it to the trash. Then firmly instructs him to prepare a nutritious meal by the time he gets back from work in overnight. "No more junk" he says. With everyone now worried, Uncle Grandpa got an idea and create a oc character that could cook. In the fortune teller carriage where he encounter with the fortune teller who give him an apple pie which he was confused.
The next day, Scott meet a p sweet and over caring old lady named Granny Smith. According to fortune teller, Granny Smith is designed to prepare delectable and irresistible meals. They waste no time for Granny Smith, who straight away begins cooking up a delicious unhealthy meal for Scott, and Uncle Grandpa. She prepares a large amount of hamburgers, french fries, pizzas and ice cream Sundays. Scott and Uncle Grandpa dig in, consuming everything on the table. Little do they do they know that they are starting to grow fat as they eat. After eating ten burgers, twelve/fifteen pizzas, nine Sundays, and fifty plates of fries, Lilo, Stitch and Pleakley become all round and fat. Strangely enough, neither of them feel full. So, they decide to keep on eating, which makes 062, now called Frenchfry, give off a devious smirk.
Lilo does not notice the side effects of Frenchfry's meals until she realizes she is late for Hula class. She shows up, but accidentally rolls over everyone like a bowling ball. Eventually, Lilo and Stitch decide to look up more on Frenchfry. Apparently, they find nothing that helps explain the reasons behind the extra weight they've gain while eating Frenchfry's meals. All they got from a video diary was that 062 was designed to be Jumba's personal chef but curiously had trouble resisting his meals and never felt full. Frenchfry gets Lilo and Stitch eating again, and they get more fatter. Just then, Gantu shows up to capture Frenchfry. Despite being overweight, Stitch still manages to take on Gantu by bouncing on him. Because it is also his Birthday, Frenchfry tempts Gantu with a Birthday cake, which he consumes and suddenly grows fat. After Gantu retreats, Lilo decides to call Jumba.
Meanwhile, Jumba is in the middle presenting his genetically engineered house pet to the scientific community when he gets a call from Lilo. She asks him about Experiment 062, and when she tells him that they reactivated him Jumba warns her to resist eating his meals. It turns that Frenchfry is actually trying to fatten them up so that he can eat them himself. This is proven right when Frenchfry takes Lilo and Stitch into the yard where he prepares a fire to cook them on. When Nani hears from Moses of what happened at Hula class, she calls Jumba as well. He confirms that Lilo and Stitch had gotten fat due to overeating Frenchfry's meals, which will wear off after twenty-four hours. However, he warns her that his experiment will try to eat them and must hurry home. Nani arrives just in time to save Lilo and Stitch, and battles against Frenchfry. With Lilo and Stitch's help, she beats Frenchfry and traps him under a swimming pool.
The next day, Lilo, Stitch and Pleakley are back to normal. Nani again serves them oatmeal, but this time cleverly entices Lilo that it is actually "mummy chow". This encourages her to eat her oatmeal, along with some "ectoplasmic slime". Frenchfry has also taken a liking to Nani's oatmeal, and vows to make healthy meals and never again try to eat people.