Apple and Onion are separately sent off to a new life in the city by their respective parents. Apple is to find an apartment that is ready for him through a map, while Onion has free housing waiting through his job at Fun Co. Upon making it to the city, the two find that what can go wrong will go wrong, and eventually find their journeys intertwined.
During a computer game-playing session, \"perfect team\" Apple and Onion find themselves with a new roommate pawing at their window: a cat. It loves to roost upon Apple's head, but seems to hate Onion because of his hair; causing tension between who spends more time with Apple.
Apple and Onion desire to be on a balloon ride, they gather all the change they can but it's not enough. Desperate to get on the ride, they work to get tips from customers at the pizza place where Pizza works, they start to scare off customers, but then realize they need to do this by being polite to the customers.
Apple and Onion decide to show their landlord Falafel an amazing day when he starts to feel homesick and after getting him mad when they didn't listen to his warnings about the air conditioner, things don't go the way they intended, however.
Apple is challenged to a fight by a grumpy Cheesesteak after Apple yells at Lemondrop, so he and Onion go on a quest to find the source of Cheesesteak's grumpiness by using the clues for a “chain reaction”. This quest starts from the hotel, then into a room, then into a kitchen, then into the sewers, then into another room, then into Edwards School.
When Burger and Hot Dog notice Onion has some pro basketball skills, they decide to ask if he and Apple would be interested to join their team for the big 4 on 4 tournaments, they accept, but Onion starts to lose for the team when he finds the voices in his head keep throwing him off and making him nervous.
Apple and Onion are banned from the premiere of their friend Hot Dog's new movie he's in: Robotot II, so they try many attempts to sneak in. Their plans involve hiding in Popcorn to get in the bathroom so they can get into the booth, using objects to fool Chicken Nugget (a police-guard), disguising themselves as dogs, and using dipping sauce.
Apple and Onion invent a new game called bottle catch (tossing a water bottle back and forth). When Energy Bar hears about it, she steals the idea. In order to get everyone to buy the many water bottles they need to sell, they try to interest them in the bottles by having a bottle catch contest against Energy Bar and Whey.
When Apple loses his shoe, Onion takes him on a guided bus tour to a shooting star show to have him wish for his shoe. But on the bus, Apple must learn to try and stay serious so they won't get kicked off the bus.
Apple and Onion are getting ready for a block party with all their friends, but a mischievous duck takes over their roof. When they are unable to get into the house because they're stuck with the duck, they try to outwit it before the cake they baked for the party melts and destroys their laptop, which holds the song they wrote for the party.
Apple tries to help Onion achieve his life long dream of being on a cook show as he is a skilled home chef, he is however scared that Apple will ruin his opportunity. Apple then ruins his opportunity and they lose the recipe but it's found out that Apple had made a song containing all the ingredients of the cake that Onion was planning to make.
Apple and Onion walk down the side walk in a "wicked style", a famous rapper notices their slick moves and decides to have them be background characters in an upcoming music video. These hopes for the duo are later complicated as a bird decides to nest in Onion's hair.
The duo try to ride a new thrill ride at the amusement park, but the curator of an old ride keeps interfering.
The duo compete to get their picture on the diner wall as the "most fun people".
In order to see a rare whale, Apple and Onion have to become members of an exclusive club, but one of them doesn't quite have the chops.
The duo try to cheer up the residents of a retirement home during a heat wave.
For once, Apple is put in charge of the dollar store. But his ideas to make money keep failing.
The duo pretend to like Burger's boring card game show so that they can use his trampoline.
Apple dreams of constructing a complex sculpture out of toilet paper, but needs a lifetime supply to finish it.
Apple becomes very jealous of Cotton Candy when she and Onion hit it off as friends.
When Onion is absent, Apple must take care of his plant. But a TV show distracts him.
A grumpy (and bossy) guest joins a party in Apple and Onion's shack. The duo try to prevent his most disliked factor, singing, from happening.
The duo promise to be by French Fry's side so that she can face her fears and recite her poetry. But then they end up locked in a pet store.
Apple becomes convinced that a movie star is his true love. But then he realizes to her dislike that he's short.
The duo bet Falafel that they can handle his job for a day with their positive attitude.
The duo get duped by a commercial into believing that their dream is to be professional pet groomers.
Apple and Onion try to control their obsessions of sausages and a video game, respectively.
The duo try to prove Shellfish wrong when she claims that they do good deeds just to selfishly gain praise.
Tater Tot wants to put Apple in his new movie because he thinks Apple is "naturally funny". This sends Apple on a quest to determine the formula that makes him funny.
The duo become obsessed with reading an old book on display at the museum. But Chicken Nugget has to guard the book in order to get his police job back.
