Cher Horowitz, portrayed by Alicia Silverstone, is a privileged and socially prominent 15-year-old residing in Beverly Hills with her widowed father, Mel (Dan Hedaya), a successful lawyer. Despite her well-meaning nature, Cher is somewhat naive and engrossed in a world of superficiality, characterized by high-end fashion and the social dynamics of her high school. Her best friend, Dionne, played by Stacey Dash, shares a similar outlook on life, although she is involved with a classmate named Murray (Donald Fasion), whom Cher deems as a pointless boyfriend.
The plot thickens when Cher receives a disappointing C grade from her debate teacher, Mr. Hall (Wallace Shawn), prompting her to devise a scheme with Dionne to find him a romantic partner, thus boosting their grades in the process. They target another teacher, Miss Geist (Twink Caplan), and orchestrate a budding romance between her and Mr. Hall through a forged love letter. Their plan succeeds, and the teachers' newfound happiness results in leniency with grading. Cher manages to elevate her grade to an impressive A minus, much to the delight of her father.
In her personal life, Cher frequently interacts with Josh, played by Paul Rudd, the serious and socially conscious college-aged son of one of her father's former wives. Their dynamic is characterized by light-hearted banter, with Cher mocking Josh’s earnestness, while he critiques her materialistic ways. Mel encourages Cher to take inspiration from Josh's grounded personality.
Things take an unexpected turn when Tai Frasier, represented by Brittany Murphy, a quirky new student with a trusting nature, arrives at Cher's school. Cher and Dionne take it upon themselves to revamp Tai's image, hoping to elevate her status among their peers. Yet, Tai sparks a connection with an easy-going skater named Travis Birkenstock (Breckin Meyer), prompting Cher to redirect Tai's affections toward the popular, recently single Elton (Jeremy Sisto). Cher's attempts to mentor Tai involve fashion makeovers and vocabulary enhancements, all while Josh expresses his disapproval of Cher's superficial meddling.
As Cher facilitates encounters between Tai and Elton, things take a dramatic turn when Cher finds herself being pursued by Elton instead. This unexpected twist leaves her feeling disillusioned and vulnerable, leading to a fateful mugging that forces her to reach out to Josh, who rescues her. This moment marks a crucial turning point in Cher's perception of Josh, as she begins to appreciate his character more deeply.
Amidst these developments, a charming new student, Christian (Justin Walker), captures Cher’s attention, prompting her to question her previous resolve of abstaining from dating high school boys. Their friendship blossoms, but Cher’s romantic aspirations take a hit when she realizes Christian's sexual orientation. With a slap of reality, she chooses to maintain a platonic bond instead.
The tides continue to shift when Tai experiences newfound popularity following a traumatic incident at school, causing Cher to worry that her friend is morphing into the very superficiality she sought to avoid. As Cher's own driving lessons—fraught with trouble—lead to failure and frustration, she reflects on her relationships, particularly with Josh, sparking a growth journey that involves charity work and moments of personal revelation.
Through her father's words of wisdom and some soul-searching, Cher understands the significance of genuine compassion. Eventually, she reconciles with Tai, fostering a harmonious friendship while encouraging her to pursue a healthy relationship with Travis. Cher's charitable endeavors win over Josh's admiration, culminating in a heartfelt moment where they both express their true feelings for one another.
The movie culminates in the wedding of Mr. Hall and Miss Geist, where Cher, alongside Josh, Dionne, and their respective partners, celebrates their transformation, embodying the important life lessons learned throughout their high school journey. In a moment of triumph, Cher catches the bouquet, symbolizing her growth and newfound understanding of love and friendship.
