Lara Jean Song Covey is a sensitive, imaginative high school senior who manages her romantic yearnings by writing secret love letters to every boy she has ever deeply fancied, intending them only for her own eyes. These unsent confessions are locked away safely in a teal hatbox given to her by her late mother. Her quiet, highly controlled
fantasy world is completely upended when her bubbly, meddling younger sister, Kitty, discovers the letters and decides to secretly mail them to the five former crushes, including Josh Sanderson, the former boyfriend of Lara Jean’s older sister, Margot, who just left for college.Panic ensues when Peter Kavinsky, one of the primary recipients and a fiercely popular lacrosse player, confronts Lara Jean about his letter. Simultaneously, Josh arrives at the house, looking for answers about his own confession. Desperate to avoid the excruciating awkwardness of facing Josh and to convince him—and the rest of the school—that she has moved on, Lara Jean impulsively proposes a fake relationship with Peter. Peter, who is equally motivated by a desire to make his gorgeous, aloof ex-girlfriend, Gen, jealous, readily agrees to the ruse.As they draft a strict contract outlining the rules of their sham romance—including holding hands in the hallways and sharing casual kisses—the lines between pretense and genuine emotion begin to blur. Spending intimate weekends together watching classic movies, eating at their favorite diner, and attending high school parties, Peter reveals a surprisingly tender, vulnerable side beneath his cocky exterior. Lara Jean finds herself falling deeply, authentically in love with him, realizing he is far more than just a handsome face.Complications arise when Gen, sensing her former control slipping away, begins scheming to undermine the couple. She ruthlessly manipulates a private moment between Lara Jean and Peter during a school ski trip, leaking a compromising video that casts doubt on Lara Jean’s integrity. Humiliated and heartbroken, Lara Jean retreats into her shell, breaking off the arrangement and trying to push Peter away to protect her fragile heart.Realizing his profound feelings for Lara Jean, Peter refuses to let her go without a fight. He tracks her down at the local track field, delivers a deeply romantic, emotionally vulnerable confession, and proves that his devotion is entirely real. Shedding her fears of
vulnerability and heartbreak, Lara Jean finally embraces her true feelings, resulting in a passionate reunion as the two officially become a real couple, ready to face the world together.