Pearl is getting ready for her slumber party, but Mr. Krabs' meddling in the party preparations is getting out of control. Pearl kicks him out of the house, so Mr. Krabs decides to stay at SpongeBob's. At SpongeBob's house, SpongeBob puts on a movie that shows girls having a slumber party and inviting their gangster (and seemingly zombie) boyfriends, who begin vandalizing the house. Mr. Krabs is horrified by this and as result, he destroys SpongeBob's television with a bat. He then explains to SpongeBob his concern that this will happen to his house, and sends SpongeBob to spy on Pearl and her friends.
Meanwhile, a sponge named Girly TeenGirl from Farawayville that looks like SpongeBob arrives at Mr. Krabs and Pearl's house, asking to get in. However, Pearl thinks she is SpongeBob and she and her friends attack the girl, who runs home crying. At the time, Mr. Krabs and SpongeBob (who wasn't in disguise yet, meaning that the girl wasn't SpongeBob) pretend to be pizza deliverers while SpongeBob calls Girly TeenGirl ugly. Unfortunately, SpongeBob is caught during the scuffle and is left behind as Mr. Krabs flees. As a result, he had been turned into pizza by the girls and sent back to Mr. Krabs, telling him that he failed the plan.
SpongeBob later sneaks back in as a piano repairman, but Pearl and her friends already know his tricks and dropped a piano on him. He leaves and tried to tell Mr. Krabs to not spy on her again, but Mr. Krabs said that if he doesn't go to Pearl's party, then he is fired. Upset, SpongeBob goes back to Mr. Krabs's house and begs Pearl to stay at her party. Pearl is convinced, but he falls down into Krabs's root beer cellar while trying to prove in ten seconds that he is fun enough for the party.
SpongeBob absorbs all of Mr. Krabs' root beer to prove that he can be fun, while in hindsight ruining Mr. Krabs' house and putting Pearl and her friends in peril. Mr. Krabs arrives at his destroyed house, and he blames Pearl for its destruction. Enraged with Mr. Krabs sending SpongeBob to spy on her and her friends (who are in shock from the incident) and ruining the party, Pearl takes his money, using it to host her own private beach party at Goo Lagoon, where Mr. Krabs and SpongeBob are the only ones not allowed in. The episode ends with SpongeBob offering a cup of root beer to Mr. Krabs to cheer him up, which does not help.
This is the second time that someone is allergic to newsprint, the first being Squidward in "Can You Spare a Dime?" A possibility is that the person may have an allergic reaction to the items that were used to make the ink for the paper.
Mr. Krabs rule of "No eating after midnight" is a reference to the movie "Gremlins."
Mr. Krabs says "You should have been here in thirty minutes or less," a reference to Domino's Pizza's and other pizza chain's famous policy of making the pizza free if it takes more than thirty minutes to deliver.
When Pearl is looking at her watch, the watch switches to her other arm.
It is never explained why Girly Teengirl was at the slumber party. At first, Pearl believes she is SpongeBob. Maybe fans believe that one of Pearl's friends invited her and forgot to tell Pearl or someone at Pearl's school told her and she invited herself.