On the evening of September 30, 1955, in Conway, Arkansas, a teenage college student named Jimmy J. spends his night watching the film East of Eden alone at a local theater. This moment becomes a pivotal point in his life, especially when he learns that the film's iconic star, James Dean, was involved in a fatal car accident in California, around the same time Jimmy J. was viewing the movie. Overwhelmed with grief and curiosity, he rushes to the local radio station in a desperate attempt to gather more details. During the morning news broadcast, a brief announcement confirms Dean's death, amplifying Jimmy J.’s sense of loss.
Jimmy J. shares a strong admiration for James Dean with his friend Billie Jean Turner, a girl from a working-class background who also idolizes the rebellious actor. Their shared passion drives Jimmy J. to involve others, including his girlfriend Charlotte Smith, his roommate Hanley, and a couple of friends, Frank and Pat. Together, they leave campus in Jimmy J.'s car to buy food and liquor at a nearby grocery store. They then gather on the banks of the Arkansas River for a party, where tensions surface. Jimmy J. becomes visibly upset because his friends do not seem to grasp the depth of his grief for Dean. When Frank mocks Jimmy J. for caring so intensely about a stranger he has never met, Jimmy J. passionately explains that he has seen East of Eden four times, and Billie Jean has watched it twenty-two times. Both have eagerly awaited the release of Dean's next film, Rebel Without a Cause, scheduled for later that month.
In a moment of intense emotion, Jimmy J. fashions an Oscar-like statuette from mud, strips to his underwear, and covers himself in dirt and wet sand. He then conducts a ritual, attempting to summon Dean’s spirit, feeling that supernatural signs, like a distant bark of a dog, confirm his belief. The police eventually arrive, prompting the group to flee back into town. Once safe, Frank and Pat tell Jimmy J. that his behavior is abnormal, calling him disturbed. Charlotte agrees to let him continue his séance later at her house, despite their concerns.
Later, Jimmy J. is surprised when his mother, Charlotte, his little brother Dickie, and Aunt Ethel come to take him to a movie. His mother appears disappointed by his unkempt, dirty appearance and worries that he will grow up to be like his estranged father, a "loser." Jimmy J. then calls Billie Jean, inviting her to Charlotte’s house for the séance that evening. Meanwhile, Coach Haynes arrives to discipline Jimmy J. for skipping football practice earlier that day.
As Jimmy J. and Hanley leave the campus again, they are joined by Eugene, played by Dennis Christopher, and they pick up Billie Jean from her home. Billie Jean, dressed remarkably like the real-life actress Vampira, wears dark makeup and a black cape, attempting to seduce Jimmy J., who politely rejects her advances. At Charlotte’s house, Billie Jean intensifies the atmosphere by darkening the room, lighting candles, and clearing the furniture. When Charlotte confronts Jimmy J. about Billie Jean, he insists that, although he has a similar rebellious streak as Dean’s Jim Stark, he has not been unfaithful to Charlotte. The group then uses a Ouija board in an attempt to contact Dean, with only Jimmy J. and Billie Jean feeling his presence.
That night, the teenagers’ séance descends into chaos as they vandalize the local cemetery. During their disruptive antics, Billie Jean’s cape catches fire after she accidentally drops a candelabrum, resulting in severe burns. The incident marks a turning point in her life.
Several weeks later, during the homecoming parade, Jimmy J. arrives on a motorcycle and spots Charlotte riding a parade float. He climbs onto the float to talk to her, confronting her about their relationship ending. After a brief exchange, he kisses her and then descends. During the parade, his friends Frank, Pat, and Eugene all pass by, greeting him warmly. Jimmy J. observes Charlotte again, who is now crowned homecoming queen, before riding away on his motorcycle towards California.
Jimmy J. then visits Billie Jean, who is recovering at home from her burns. She is wrapped in bandages and has not spoken since the accident. As he recounts watching Rebel Without a Cause multiple times to tell her about the film, he admits how deeply the story reflects his own life, especially pointing out the parallels between Dean’s characters and his personal struggles. He confesses that he feels responsible for Billie Jean’s injuries because of the recklessness and emotional turmoil he experienced, similar to Dean’s character in the movie. He asks for her forgiveness while preparing to leave for California to visit the site of Dean’s tragic death. Billie Jean finally speaks, begging him to "stop it" and not send her away to a sanatorium for electroshock treatment as her mother, Melba Lou, has planned, in an effort to cure her muteness. She pleads for him to break her mirrors so she cannot see the scars that remind her of her trauma. Jimmy J. complies, smashing the mirrors, but the act enrages Melba Lou, who, upon seeing Billie Jean’s distress, joins her daughter in condemning Jimmy J., reminding him that "life is not a movie." Disheartened, Jimmy J. leaves her home, feeling the weight of reality encroaching on his idealized fantasies.
Later, Jimmy J. watches Charlotte in her role as homecoming queen from a distance during a football game. As she is crowned, he rides off on his motorcycle once again, heading toward California, seeking out the inspiration and closure he hopes to find at the site of James Dean’s tragic death. Throughout his journey, he is burdened with the memories of love, loss, and the harsh truths that finally ground him in reality.
