Freddie's in need of some guy time, so he tags along with Spencer to go fencing. Freddie's a natural, but things get complicated when Spencer gets him involved in a match with the amazing Doug Toder. Meanwhile, Carly has to plan a dinner for her weird relatives, the Dorfmans, and with Spencer busy fencing, she might not get much help. Sam reveals that she has never read a real book, and a bet begins between her and Freddie: can Sam finish a book?

Lewbert, Carly's doorman, is injured during an exploding muffin basket prank. Spencer suggests that Carly, Sam, and Freddie help him until he's back on his feet, but it is more easily said than done. When Freddie's mother takes over, she makes it look easy, but leaves the group extremely concerned. Freddie's mother and Lewbert fall in love. Meanwhile, while using a CB radio, Spencer upsets two truckers nicknamed Porkchop and Sledgehammer.

The iCarly crew tells their viewers to vote for David Archuleta on America Sings, who is crowned the winner. Feeling guilty about swaying the votes, they invite the America Sings runner-up, Wade Collins onto their show. Meanwhile, Sam teaches Spencer how to lie so he can deceive a local video store.

Sam has a twin sister named Melanie (Portrayed by Jennette McCurdy). Freddie is not convinced, and to try to prove it, he sees Melanie in person and invites her to a dance with him as his date. The plan to try to prove that Melanie is really Sam takes an unexpected turn when Melanie kisses Freddie, who then becomes extremely paranoid. Meanwhile, In the end, since Freddie refuses to believe it, Sam admits to Freddie that there is no Melanie. Satisfied, Freddie departs right before Melanie (who reveals that she still has romantic feelings for him) arrives to go to the mall with Sam and Carly. Meanwhile, Carly tries to tutor Chuck in math, and Spencer shows Carly how evil Chuck really is (with the help of a hidden video camera that Socko set up). Carly gets revenge on Chuck by telling him there's a new number called "dirf" between 5 and 6, and because of this, Chuck fails his math test and Spencer gives his dad a brochure about a summer math camp called Camp Add-m-Up, sending Chuck to math camp for the whole summer.

When Carly has trouble finding a date to a dance, Sam asks for Seattle-area boys to apply to be her date. When the gang is overwhelmed by the amount of boys who show up, they hold a speed-dating session. Meanwhile, Carly convinces Sam to ask Gibby to the dance since no one else did, but Sam becomes enraged when Gibby turns her down. Carly finally finds a boy, whom after the dance, she dumps for being so talkative. In the end, Carly and Freddie share a dance together at the Groovy Smoothie, which Sam walks in on. Upon seeing them, she silently leaves.

An eccentric billionaire asks the iCarly gang to perform a web show from outer space; Spencer is visited by a mysterious little girl.

When the gang goes into business selling penny T-shirts, Sam recruits children in fourth grade to help make them.

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.

Freddie decides he wants to be a creative member of the iCarly team which includes him wanting to perform on the show. Freddie wants to co-host the show with Sam while Gibby works the camera. Things, however, go awry. During the episode, Freddie broadcasts a web show with 3-D effects, which messes up people's vision. Meanwhile, Spencer hires a personal assistant named Marty..

After Sam wins a golden ticket for a Canadian Fat Cake VIP Tour, Sam, Freddie, Spencer, and Gibby go to the Fat Cake factory in Canada, but Sam's greed finally gets the better of her when she tries to smuggle over 100 Fat Cakes over the border, since Canadian Fat Cakes are illegal in America.

The iCarly crew tries to find an adult friend for Spencer.