Jenna's mothers' friend Ally comes into town since Jenna's dad is away on business. Ally has been known for being a causing trouble and whenever she's over, something always goes wrong. Ally decides she wants Jenna to throw a "kick-ass" party so Ally and Jenna's mom hack her homepage and send out invites to all of Jenna's classmates. At first Jenna is against the idea, despite Tamara's pleas, and she only changes her mind when Matty calls and asks what time he should be over for the party. Then Tamara's gets even more excited cause her long-time crush Ricky is coming to the party.
After Ally and her mom give her a makeover, Jenna still doesn't feel comfortable at the party, so Ally gives her a pill to help her relax. Afterwards the rest of the night is a blur for Jenna. She wakes up the next day, not remember at all what happened the night before and finds tons of notifications and pictures on her homepage.
As the day progresses and her, her mother and Ally clean up the party mess, she gets flashes of memory from the night before. Ally tells her she shoved her tongue down some guys throat, but she doesn't know his name, only that he had green shoes on.
Between Jenna worrying about whether she hooked up with Jake or Matty and Tamara not answering her phone calls, she starts to freak out. She remembers talking to Matty in the hallway and telling him that "he thinks he's a big shot basketball player and doesn't like her and only likes to party" in which Matty gets upset and leaves the party. Mortified, Jenna texts Matty to apologize for the way she acted and what she said the night before, to which he replies "sure".
The next flashback she gets is of her talking to Jake saying "You're the nicest guy I've ever know, you're like a puppy, which is good cause everyone loves puppies, I love puppies". Jake comes to Jenna's house later in the day to return her dad's shirt because she "threw up on his shirt after giving him a lecture about kissing her after detention".
The last flashback she has is of Tamara showing Ricky (and essentially the who party) her boobs through the glass door. After doing so Ricky goes outside and Tamara gets upset and tells Jenna to go talk to him. Jenna still can't connect this piece to what happened last night and she still doesn't know who she "attacked with her tongue".
Ming calls her and tells her to look at the crazy pictures on her page. As Jenna looks on her page she sees many outrageous pictures on her page, she see's a picture of her making out with Rick while Tamara stands on the sidelines watching.
She immediately goes over to Tamara's house with a peace offering and telling her she's sorry and she would "never even think of kissing Ricky" to which Tamara screams at her that "you think you're too good for him just because you hooked up with Matty". Tamara also tells Jenna she needs to wake up because Matty is only using her for sex. Then the most shocking part of the episode is when Tamara says "I'm glad I wrote you that letter (from the first episode)! You're dead to me Jenna!" and is the assumed end of their friendship.