In the vibrant heart of Manhattan, a curious discovery awaits Sheila, a regular at June's nail salon. When she unexpectedly finds a time machine hidden within a tanning bed, her life takes a thrilling twist that leads her to a quaint pub where she crosses paths with Gary, a mild-mannered man who prefers immersing himself in the cinematic world over engaging in sports. As their evening unfolds, an instant connection sparks between them, ignited by shared tastes in drinks and nostalgic stories from their childhoods.
During a series of dates, Sheila reveals the incredible nature of her newfound power: she has been reliving the same day for the past week, thanks to June's time machine. With a promise of seeing Gary again, their date concludes on a positive note, hinting at a blooming friendship. However, as her journey continues, Sheila confides that the catalyst for her time travel began on the day she attempted to take her own life. It is through numerous resets that she experiences the warmth of a connection with Gary and revels in the joy she has been sorely missing for years.
Through this cycle of repetition, Sheila casually brings up her childhood reminiscences of a kind cable technician who once visited her home, a man whose impact has always lingered in her memory—even though she doesn’t quite grasp the reason she's fixated on him. Suddenly, the weight of her emotional struggle becomes apparent when, five months into their reset adventures, she finds herself at the very spot on the Manhattan Bridge where she once planned her leap. In a moment fraught with intensity, Sheila professes her love for Gary, leaving him visibly distressed and leading him to end their date.
As Sheila continues to grapple with the monotony of repeating the same night for the 364th time, she seeks to revitalize their connection by trekking further back in time to remold Gary’s personality. No longer the quiet cinephile she once knew, he now appears as a self-assured businessman with a new disinterest in films. Her attempt to breathe new life into their relationship takes a darker turn when she confesses to having manipulated crucial aspects of his life by removing several negative influences and masquerading as “Uncle Charlie,” which only frustrates Gary further.
Despite Sheila's efforts to amend her miscalculations, Gary begins to piece together the reality of their repeated days, realizing just how many times they have traversed through this temporal loop. Stricken by her past struggles, he attempts to dissuade her from the path of self-destruction, utilizing the details he acquired during their numerous romantic encounters—details that lead him back to June and the fateful time machine.
The narrative takes a poignant twist when June, witnessing Sheila's deep despair, alerts Gary of her intentions. When he finally reaches her, he speaks of the future, assuring her that she did not go through with her plans, promising that they will reunite "tomorrow." This glimmer of hope compels Sheila to follow Gary, steering her life onto a different path as they step together into a brand new day, free from the shackles of her haunting past and blooming anew beneath the hopeful rays of the sunrise.
