A decade after the events of Clerks, Dante Hicks (Brian O'Halloran), a 32-year-old still stuck in his dead-end job at the Quick Stop convenience store, returns to face another challenging day. However, upon lifting the security shutters, he is met with the shocking sight of the store engulfed in flames. The culprit? His long-time best friend, Randal Graves (Jeff Anderson), who had carelessly left the coffee pot on the night before. With the Quick Stop destroyed, the duo finds themselves employed at a Mooby's fast food restaurant.
After nearly a year at Mooby's, Dante is on the brink of a major life change, planning to leave New Jersey for Florida with his blonde, wealthy fiancée, Emma (played by Jennifer Schwalbach Smith). Meanwhile, the ever-charming duo of Jay and Silent Bob (Jason Mewes and Kevin Smith) continue to follow Dante and Randal, now loitering outside Mooby's. Despite having cleaned up their act after a stint in rehab, they can't resist their old habits of performing antics and selling drugs in the parking lot.
On this particular day, Dante's last before his big move, Randal plans a "memorable sendoff," which involves secretly booking a donkey show for the restaurant's closing time. Randal takes particular delight in toying with his naïve, 19-year-old coworker, Elias (Trevor Fehrman), who idolizes both Transformers and The Lord of the Rings. Randal's disdain for both franchises leads him to scornfully confront a customer who shares Elias' passion, resulting in the customer's explosive reaction.
Dante has developed a close friendship with their manager, Becky Scott (Rosario Dawson), with whom he recently shared a drunken one-night stand. Despite the apparent casualness of their conversations, Becky is visibly unsettled by the impending changes in Dante's life. As they serve customers together, an encounter with a high school rival, Lance Dowds (Jason Lee), reignites old tensions when Randal recounts humiliating tales from their past. The tension continues to rise when Randal's crass remarks unexpectedly offend two customers.
As Dante grapples with feelings for Becky against the backdrop of his engagement to Emma, he confides in her about his fear of marriage. In a light-hearted moment, Becky takes him to the roof for a dance lesson, igniting unresolved emotions as Dante admits his love for her—just as she reveals her unexpected pregnancy from their one night together.
Caught in a whirlwind of emotions and secrets, Dante confesses to Randal about Becky's pregnancy, prompting a series of misunderstandings that unravel at the worst possible moment. Randal inadvertently announces the news to Becky, leading to a confrontation where she drives off in anger, leaving Dante furious with his friend for ruining his life. With a chaotic donkey show and the fire department responding to an emergency call, mischief and mayhem ensue.
In the aftermath of their calamity, Dante and Randal find themselves in a jail cell, grappling with their friendship and responsibilities. The argument forces them to confront their feelings of nostalgia and the possibility of reopening the Quick Stop together, reigniting their passion for what once brought them joy.
In the end, Dante decides to build a family life with Becky and proposes at the Mooby's drive-thru, signaling a fresh start. Together, they embark on restoring the Quick Stop, hiring Elias to join their new venture. The film concludes with a hopeful vision of Dante and Randal working side-by-side at their revitalized store, finally in control of their destinies.
