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 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.