Welcome to Laguna Beach and the life of eight high school friends who were born and raised in this beautiful seaside town. As the senior girls prepare for one of their infamous hotel parties, Stephen is torn by his attraction to two girls, Kristin and LC. After Kristin confronts him about his night with LC, sparks fly as they all attend the Black & White party.
A double-date dinner turns from bad to worse when Stephen gets jealous about phone calls Kristin is receiving from another guy. LC and Lo drop in on Trey's AYA (Active Young America) Open Mic Night, and the whole gang gathers for a bonfire on the beach where things heat up between LC, Stephen and Kristin.
When LC, Stephen and Trey check out a designer fashion show in LA, LC watches Stephen's attention turn from fashion to fashion models. Meanwhile in Laguna, Kristin, Alex, and Sam, a junior hottie, go look at expensive cars, but Kristin's day of joyriding comes to a surprisingly abrupt halt, causing a nightmare no one expected.
When Morgan throws Christina an 18th-birthday bash, she cuts LC and Lo from the guest list, so bumping into them the next day at the nail salon was sweet irony. Christina and Morgan then head to NYC for their spring break trip. While Morgan soaks in the big city fashion, Christina is challenged by the audition of a lifetime.
It's prom time, and while everyone is caught up with who's going with whom, which pair of Charles David shoes look best with their dress, and how to fit everyone in the stretch Hummer limo, Kristin's biggest concern is a drama-free night with Stephen. She's confident it will be… as long as LC keeps her distance.
Tessa is the new narrator of Laguna Beach, and her world consists of her best friend Raquel 'Rocky' & her best friend (possibly boyfriend) Chase. Kyndra invited former friend Tessa to her get-together party, but Tessa insisted on not going unless Raquel went with her. Kyndra, Cami & her clique were not so pleased to find an uninvited guest at their party. Meanwhile, Jessica, Alex H., Taylor & Alex M all meet up for an afternoon lunch, where Jessica reveals her likeness towards Cameron, who also would like to hook up with Kyndra.
Raquel decides to throw a surprise party for Tessa, while Cami & Kyndra are interested in crashing it. Chase had told Tessa he wouldn't be able to make her birthday party, but Tessa was shocked to see him perform with his band as a surprise to her party. As romance stirs between the two, Chase is questioning his connection with Tessa because the band is getting famous. Meanwhile, Kyndra gets Cameron over dinner, to confess his number of hook-ups with Jessica.
It's Christmas time and the two cliques rein on throwing their own X-mas extravaganzas. The drama revolves around Rocky's party and how Cami & Kyndra decide they're gonna crash her party to due her uninvited appearance at Kyndra's. Trouble stirs between the girls and eventually Cami, Kyndra & the gang leave. The next day is Kyndra's holiday party, although Cami obsesses over the drama stirred at Raquel's last night, the focus is around Kyndra & Cameron and how he leaves the party for Jessica because Kyndra assumed .
Breanna wants to clear up the clouds between Raquel and her over lunch. Chase & Kelan take Lexie & Tara out to dinner, but Kelan isn't ready to make a move on Lexie just yet. Raquel makes her way to Breanna's pool party but gets a cold shoulder that sends herself home to find her real best friend Tessa waiting up for her.
Tessa hasn't model for a while since she was sick. So when she is asked to model in San Diego she's a little bit nervous. She invites Raquel, Cameron, Nick W, and Stephen to support her modeling. When she was done they went back to hotel to get ready to go to the restaurant. When they go to the restaurant, Cameron starts to flirt with Tessa. When they go back to the hotel things heat up between Cameron and Tessa. But on there way back to, Laguna, Cameron feels bad about the hook up so he decides to make nothing of it.
While cooler temperatures head in, things are just beginning to heat up in Laguna Beach. It's time for the winter formal, the one dance where it's tradition for the girls ask the guys. But with so few solid relationships going on, it's all up in the air about who will ask whom--and who they'll end up with at the end of the night.
Some of Laguna Beach's cast members gather in the MTV studio in New York to talk about their life with the filming crews around them.
Some cast members of the season two gather for a life event after the season finale in the in the MTV TRL studio. Hosted by the TRL hosts and part of the show went on in the daily TRL episode.
Special live episode hosted by Susie Castillo. Some of the Season 3 cast answer questions from the fans and talk about what's happened since the Season 3 finale.