In part one of the series premiere, Harrison Wilson accepts the position as Principal of West Beverly Hills High, forcing the Wilson family to relocate from Kansas to California and adjust to new life in the city - all while keeping a close watch on their alcoholic grandmother, fading Hollywood actress Tabitha Wilson.
In part two of the series premiere, Dixon must deal with jealous teammates on the lacrosse team and Annie breaks up with her boyfriend back home but soon meets a potential love interest.
Harry and Debbie plan a family bowling night, but find their plans interrupted by the "unexpected" arrival of Annie and Dixon's friends. Meanwhile, Annie finds herself torn between Ethan and Ty, Naomi experiences a difficult evening with her philandering father, and Kelly and Silver learn that Jackie's drinking is spiraling out of control.
Annie, Harry, and Debbie are shocked to learn that West Beverly's theater director can no longer oversee the school musical. Kelly persuades Brenda to take over as the play's director, but they end up arguing over Kelly's involvement with Ryan. Meanwhile, financial struggles lead Dixon to get a job at the Peach Pit, and Naomi confronts her father's mistress.
As the opening night of the school musical approaches, Ty reveals to Annie his plans for a one-on-one after party in his hotel room with her. When Annie's dad catches her in a compromising position with Ty, he becomes concerned about how fast their relationship is developing. Meanwhile, Naomi can't accept her parents' divorce and Adrianna is confronted about a substance abuse problem, giving Annie the chance to take the lead in the musical.
After Debbie lands the chance to shoot a fashion show for Nylon Magazine, Annie uses the opportunity to her advantage for a class assignment. Naomi believes the upcoming show could help fix her parents' marital mess, but it only makes matters worse. Ty and Annie's relationship is put to the test when Adrianna reveals a secret. Meanwhile, Kelly receives a phone call that could change her relationship with Ryan.
As Silver's "half birthday" approaches, she decides to spend a spooky evening watching movies with her friends at the famous Hollywood Forever Cemetery. Harry's past returns to haunt him when Tracy reveals she is searching for their son. Annie and Ethan are paired up for an assignment, which deepens their connection after the two take care of a baby. Naomi confronts Adrianna as her drug addiction spirals out of control. Meanwhile, Ryan mourns Kelly's unexpected departure.
After recuperating from her health scare, Adrianna returns and tries to make amends with Naomi, but her ex-BFF refuses to forgive her for the betrayal. Adrianna makes a surprising connection with Navid, who helps her through her situation. Meanwhile, Annie and Ethan finally take their rapidly growing romance to a new level during the school's homecoming dance, causing Naomi to feel jealous.
Silver invites a few of her female friends over for a girls' night, but the event quickly turns into a house party. Meanwhile, Debbie and Harry finally reveal to Dixon and Annie that they have a brother who was given up for adoption.
Kelly returns to Beverly Hills, revealing what happened between her and Dylan during her trip. Meanwhile, Annie turns sixteen and gets a surprising gift from Naomi. Also, the Wilson family receives a visit from Harry's biological son, Sean.
Brenda and Kelly's friendship takes a turn for the worse. Meanwhile, Sean moves in with the Wilson family, Naomi hangs with a new crowd, and Silver becomes jealous when a cheerleader pays a little too much attention to Dixon.
Brenda receives life changing news. Meanwhile, Dixon grows closer to Christina, and an unexpected secret is destined to rock Adrianna's world.
Electrifying revelations stir up trouble this week as the teens of West Beverly come clean to each other. Adrianna reveals her secret to Naomi and Navid, who handle the news differently than expected. And when Dixon reveals the depths of his feelings to Silver, their relationship takes a surprising turn. Meanwhile, Tabitha surprises her grandchildren with an unexpected gift, and Annie and Ethan escape from Beverly Hills to the desert beauty of Palm Springs.
The return of Mr. Matthews causes a mixed reaction at West Beverly Hills High. Also, the Drama Department holds auditions for "Antony and Cleopatra," and Annie decides to read for a role. Meanwhile, Silver and Dixon continue to experience bumps in their relationship.
A cheerleader invites the gang to a house party where Fall Out Boy will perform and Navid moves on from his relationship with Adrianna by connecting with a girl named Nika. Meanwhile, Ethan gets involved in an unexpected mishap.
Adrianna's baby bump is the major topic of conversation among the gossip mongers of West Beverly High. Baby Daddy Navid continues to ignore her, while growing closer to Nika. Dixon freaks out when Silver gets a much too permanent symbol of their love. Meanwhile, Ethan's friendship with Rhonda continues to blossom.
Liam displays his dark side to Naomi, who is stunned but captivated by the intense, handsome bad-boy. Meanwhile, Annie spends a drunken evening under the stars with fellow thespian Max.
Silver, distraught from all the recent film commotion and Dixon's not-so-positive reaction, disappears into the night. Kelly enlists Ryan's help in finding her sister, but cannot seem to figure out why she is acting so erratically. Meanwhile, Dixon breaks the video news to Debbie and Harry, and Navid and Adrianna get a preview of parenthood when they babysit Sammy.
Silver and Kelly receive an unexpected visit from Donna. Meanwhile, Dixon locates his biological mother and enlists Annie's help to go visit her. Also, Naomi's infatuation with Liam gradually increases.
Donna faces a heartbreaking dilemma when she must choose between returning to her life with David in Japan, or moving back to Beverly Hills with their daughter, Ruby. Meanwhile, Silver's recent issues are the major topic of conversation at school, and Annie and Naomi make a decision about their friendship. Also, Ethan continues on his recent downward spiral due to Liam's bad influence, and Adrianna and Navid meet with potential adoptive parents for the baby.
Naomi's older sister, Jen, unexpectedly returns to Beverly Hills. Meanwhile, Naomi persuades Annie to go on a double date, and Adrianna and Navid reveal their decision to his parents.
Following their engagement, Navid and Adrianna celebrate their respective bachelor and bachelorette parties. While Adrianna feasts with friends and family at the Wilson home, Navid and the boys spend a wild night with college girls at a burlesque club. Meanwhile, sparks fly between Ryan and Jen, and Dixon continues to feel unappreciated by Silver.
With prom night quickly approaching, Annie, Adrianna, Naomi, and Silver get glammed up by a famous stylist. A dateless Annie agrees to attend the event with the extremely nerdy Charlie, who is massively crushing on the popular girl. But when he realizes that her interest is purely platonic, a furious Charlie plots an evil revenge. Meanwhile, Dixon is nominated for Prom King, Ethan gets accepted into lacrosse camp, and Kelly and Harry work to get Liam on the right track.
Adrianna and Navid are forced to make an impromptu exit from the prom when Adrianna goes into labor. Dixon confronts Ethan about Silver when he notices that Ethan might be developing feelings for his girlfriend. Meanwhile, Annie reaches the breaking point when Naomi accuses her of trying to hook up with Liam, and some of her peers (still angry about the after party fiasco) decide to take both verbal and physical action against her.