Carly, Sam and Freddie want their show to be reviewed. Carly risks receiving a bad review when she insults the annoying eleven year old who runs a popular site that rates web casts.

The Plain White T's are set to perform on iCarly, but Nevel plans to ruin the event by hacking into the site.

When Spencer makes an electromagnetic Christmas tree, the tree bursts into flames, which makes Carly furious at him because the fire mauled the presents Carly got for Spencer. Carly then wishes that Spencer was born normal. Carly's guardian angel, Mitch, makes this wish come true, surprising Carly. The next day, at school, Sam is absent, Freddie was never friends with Carly, and to make things worse -- Nevel Papperman is Carly's boyfriend. Carly questions Mitch about Sam's disappearance, and Carly is taken to the Juvenile Detention Center, where Sam is being held. Carly finds out that Sam was never her friend, either. Carly returns home and then is told that Mrs. Benson and Spencer are now engaged, making Carly angry at what the world has become. Carly then walks up the stairs and finds out that, because Sam and Freddie were never her friends, iCarly never existed, either. Carly begins to sob, realizing how much the world would change if Spencer was born normal. Mitch turns the world back, making Spencer born abnormal. Carly is now happy with the electromagnetic Christmas tree, and Carly, Sam, Freddie and Spencer have a good Christmas together in the end.

iCarly holds a giveaway contest for a new car -- won by their nemesis, Nevel Papperman. Meanwhile, Spencer buys a Galaxy Wars prop online.

Spencer gets a new credit card after canceling his old one, causing Carly, Sam, and Freddie to lose control of the iCarly.com domain. Luckily, Mandy (who appeared in "iAm Your Biggest Fan") returns to buy their website back for them, but she gets tricked into giving it to Nevel. Spencer disguises as an old woman to trick Nevel into signing the URL transfer document during a book signing, but is chased out by security after Nevel recognized him. Later, Nevel demands a kiss from Carly in return to claim the transfer document. Carly confronts Nevel, and Nevel signs the document. However Carly escapes with the signed document without having to kiss Nevel and succeeds in reclaiming their website.

Carly and martial-arts champ Shelby Marx (Zoey 101's and Spectacular!'s Victoria Justice) agree to have an exhibition fight for charity after Carly jokingly challenges her to a match. Unfortunately, Carly accidentally falls on Shelby's grandmother during a press conference. Thinking Shelby wants revenge, Carly backs out of the fight, only to be ridiculed as a coward. Carly visits Shelby and apologizes, and the fight is back on. However, Nevel Papperman alters a clip of the press conference to make it look like Carly intentionally tackled Shelby's grandma to dupe Shelby into fighting Carly. Shelby, furious, attacks Carly for real during the match, nearly killing Carly and Carly barely won the match with her life. Nevel's plot is revealed, and the show concludes with Shelby appearing on ICarly. Meanwhile, Spencer suffers from ridiculous side effects while taking an experimental allergy medication.

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Nevel's image is ruined after a video of him berating a child goes viral, so he asks Carly and the gang for help in restoring his reputation.

Carly, Sam, and Freddie wonder why people can't celebrate Halloween more than once a year. They decide to celebrate it halfway through the year as well creating a new holiday termed "Halfoween" and have a party.