Ben Wrightman, only seven years old, embarks on an unforgettable trip to a Red Sox game with his beloved Uncle Carl, who has filled the role of a father figure in his life due to his lack of children. The opening narrative sets the stage, revealing how this experience became a turning point for young Ben, igniting an insatiable passion for the Red Sox that follows him into adulthood. His devotion is so profound that nearly every possession he cherishes flaunts the team's emblem, reflecting his unwavering loyalty; the exception being his toilet paper—bizarrely emblazoned with the insignia of their long-time rivals, the New York Yankees. After the untimely death of his uncle, Ben inherits his cherished season tickets, which only deepens his connection to the team.
Fast forward 23 years, and Ben, played by Jimmy Fallon, has grown into a schoolteacher who, despite the passage of time, still embodies a youthful immaturity. It is during this phase of his life that he crosses paths with the ambitious and driven Lindsey Meeks, portrayed by Drew Barrymore. A successful executive caught in the whirlwind of her career, Lindsey initially turns Ben down when he seeks to take her out, but fate has other plans, as she later decides to give him a chance.
On their inaugural date, chaos ensues as Lindsey falls victim to food poisoning from a trendy restaurant she had visited that same day. In a surprising show of care and compassion, Ben stays the night to attend to her, demonstrating a commitment that surprises Lindsey. The following morning reveals a tender moment between them as Ben wakes up on her couch, leading to the blossoming of their romantic bond.
As their relationship progresses, Lindsey begins to warm to Ben’s unwavering dedication towards his beloved team, discovering a sense of attraction towards him for his fervent passion. In a delightful yet unconventional twist, Ben stages a mock proposal—only to ask her instead to accompany him to the Red Sox's highly anticipated home opener. The event features a notable guest, the acclaimed author Stephen King, throwing the ceremonial first pitch. Despite Lindsey’s unfamiliarity with baseball culture—having no clue about the infamous Curse of the Bambino or even how to pronounce the legendary player Yastrzemski—that doesn't deter Ben's enthusiasm, and the couple enjoys attending games together.
However, the summer takes a sudden turn when Lindsey attempts to work during a game, only to be knocked out by a foul ball, disrupting their routines. As the situation escalates, Lindsey invites Ben to Paris, but his steadfast loyalty to the Red Sox causes him to decline, sparking tension between them. In a moment of vulnerability, she hints that she might be late—implying a pregnancy—yet it is later revealed that she isn't expecting after all. Frustrated by Ben’s dedication to baseball over their relationship, Lindsey struggles with her feelings as Ben reluctantly agrees to cancel a crucial game to join her at a birthday party.
Their night together brings joy, and Ben confesses it's one of the best evenings he's ever experienced. The bliss is short-lived, however, when he gets news about a groundbreaking Red Sox comeback, leaving him furious with himself for missing that historical moment. Their relationship reaches a breaking point as Lindsey accuses him of breaking her heart, leading them to temporarily part ways.
Ben's longing for Lindsey drives him to consider selling his treasured season tickets, a gesture meant to demonstrate that she means more to him than baseball ever could. Unfortunately, his efforts go unnoticed until it's too late when Lindsey learns of his plan during a festive celebration for her career advancement. In an act of desperation and love, she races to Fenway Park just as Ben is on the verge of signing his tickets away.
During the dramatic climax, she manages to infiltrate the eighth inning of the playoffs against the Yankees, just three outs away from a historically pivotal game. With swift determination, Lindsey dashes across the field, overcoming security to confront Ben. In a gripping moment, she tears up Chris's contract, insisting that her love for him means he should keep his season tickets. Their heartfelt reunion culminates in a passionate kiss, witnessed by a roaring crowd.
As the film draws to a close, a narrator recounts how the Red Sox triumph in that game and continue to overcome the odds, ultimately clinching their first World Series title in an astonishing 86 years. In a bittersweet twist, Ben and Lindsey marry, and as they anticipate parenthood, the narrator playfully hints at the names they may choose for their child, suggesting Ted (in honor of Ted Williams) if it's a boy or Carla (for Carl Yastrzemski) if it's a girl—while secretly wishing for a son.
