The story unfolds in 1982, centering on Brian David (Austin Zajur), a cinema-obsessed teenager who eagerly calls Melody Barnegat (Siena Agudong) at her workplace. Their conversation is lively, filled with flirtation and charm, as memories of a stolen kiss in Melody’s pool the previous summer dance through Brian's mind. He excitedly shares that a film adaptation of "Bucklick," a detective novel they've both ridiculed, is screening that afternoon, and Melody, enchanted by Brian's unwavering enthusiasm, agrees to accompany him and his friends for the 4:30 showing. A rush of excitement surges through Brian as he hangs up.
Juggling his passion for film and a part-time gig with the quirky Cookie (Method Man), Brian also confides in his best friend Belly (Reed Northrup), before meeting the boisterous Burny (Nicholas Cirillo), whose playful ribbing about Brian’s crush on Melody plays out with a tone that hints at deeper insecurities about height and weight. Burny idolizes Major Murder (Sam Richardson), a professional wrestler he regards as the epitome of masculinity.
As plans unfold for a fun day filled with movies, the group first attends a screening of Astro Blaster and the Beaver Men, a kitschy space opera that draws their attention, echoing the vibes of the beloved Flash Gordon. However, while waiting in the snack line, Belly finagles a confrontation with a persistent child and, inevitably, Manager Mike (Ken Jeong) kicks him out of the theater. Never ones to quit, the trio concocts a plan for Belly's secretive return through a back entrance.
Settled in their seats, they revel in an array of enticing movie trailers, including Sister Sugar Walls, a darkly comedic flick starring Sister Sugar Walls (Harley Quinn Smith), followed by the spine-tingling The Health Nut, and a creature feature called Booties, which depicts a monster's gruesome end of a hapless Construction Worker (Jason Biggs).
An unexpected summons to Brian from the alluring Hot Usher (Genesis Rodriguez) interrupts their movie-going experience. Manager Mike relays the call on Brian's mother's urgency, severely complicating the boys' plans. Upon returning, Brian finds Burny entangled in a compromising situation with a classmate, Jessica ([Evelyn Giovine]), just as Manager Mike extends an unfavorable ban on Brian due to Melody’s change of plans for the day.
In the chaos that follows, the boys decide to shift gears, aiming for a horror movie instead, but find themselves facing more hurdles, including Belly's misguided antics. He nearly gets into further trouble after wandering into the bathroom with a dubious artistic distraction. Meanwhile, Brian, hoping to forge a path for Belly and Burny to sneak back into the theater, engages the Emo Usher ([Adam Pally]) in a deep discussion about societal issues and cinema's future.
Their stealth results in unfavorable recognition, leading to a ban from the theater that sends them onto an alley where tensions boil over between Brian and Burny, revealing insecurities tied to Brian’s admiration for Melody. Belly's keen insights shed light on the underlying issues, resulting in Burny leaving the group in frustration.
On the sidelines, Burny finds inspiration from a heartfelt conversation with Major Murder, who opens up about his own past insecurities, encouraging a sense of confidence. Meanwhile, outside the theater, Brian discovers a connection with Hot Usher, igniting a shared love for film and fueling his ambitions.
As Melody arrives with hopes to catch a movie with Brian, she learns about his ban and steps in to confront Manager Mike, only to see her own participation barred as a consequence. Yet fate turns as Burny stirs chaos by ramming his truck into Mike's prized "movie mobile," creating just the distraction Brian and Melody need to slip back into the theater.
As they take their seats for the screening of Bucklick, the atmosphere gets tense when Melody's mother, Mrs. B (Betty Aberlin), unexpectedly finds her daughter at the theater, confronting her about neglecting household duties. Melody courageously counters, suggesting that both her mother and aunt should not be so critical when they are enjoying a film that they were supposed to watch together.
As day transforms into evening, Brian and Melody share a heartwarming stroll, their dialogue flowing with laughter and candid hopes for the future. Locking eyes, Brian pours out feelings he’s harbored over the past year, leading to a tender moment solidified by a kiss, with Brian delightfully imagining a cinematic future for their relationship.
The film concludes with a glimpse at the crew's lives post-narrative, showcasing Brian, Melody, Burny, and Belly in a cozy setting at the iconic Quick-Stop Groceries, where Brian gears up to apply for a job, albeit deciding that sharing a meal with friends is paramount over paperwork.
As the credits roll, the audience is treated to a hilarious montage of bloopers and outtakes, behind-the-scenes moments that encapsulate the spirit and camaraderie shared among the cast throughout the film’s creation.
