In Greater Boston, Emma Harwood, a bookstore clerk who is deaf in one ear, catches the eye of Charlie Thompson, a British museum director, as she reads at a café. He approaches, apologizes for an earlier stumble, and suggests starting their encounter over. What begins as a shared spark quickly deepens into a genuine connection, and they eventually go on a date that marks the start of something lasting.
Two years pass, and Emma and Charlie are now engaged. One night, while strolling through the city, they witness their wedding DJ, Pauline, smoking heroin in a public park. The moment unsettles them, and they turn to their wedding party—maid of honor Rachel and best man Mike—to discuss whether Pauline should be fired. Emma emphasizes a point she’s made before: each of them has likely done bad things. The group takes turns revealing their darkest actions. [Mike] recalls using his ex-girlfriend as a human shield during a dog attack in Mexico; [Rachel] admits to locking her mentally disabled neighbor in a closet inside an abandoned RV overnight; and Charlie confesses to cyberbullying a classmate so severely that the boy’s family moved away. Then Emma drops a shocking truth about her past: at fifteen, she planned to commit a school shooting. She explains that she had told Charlie she was born deaf, but she actually lost her hearing when she fired a gun too close to her ear while practicing in the forest. The confession leaves the group stunned, especially Rachel, who reveals that her cousin Samantha was paralyzed in a shooting.
Charlie begins to question whether the wedding should proceed. Emma explains that she abandoned her plan after witnessing how a mass shooting devastated her own community and instead began advocating for gun control. The couple’s once-clear future becomes clouded as they increasingly worry about how they see one another, and their ability to communicate frays under the weight of secrets. Despite the mounting strain, they press forward with wedding preparations. Emma’s nightmares grow more frequent, filled with shooting imagery, while Charlie’s paranoia intensifies, fed by gun-related items found at home and at his workplace.
At Emma’s workplace, the situation with Rachel grows tenuous when her supervisor questions her absence, and Emma considers removing Rachel from a project she had been recommended for. Rachel withdraws from Emma and declines the wedding invitation, though Charlie eventually convinces her to attend. An awkward run-in with Misha leaves Charlie rattled; he frantically reassures her that she “would love Emma,” a line that casts a shadow over the couple’s trust.
During the wedding week, Emma and Charlie also contend with workplace tension: Charlie’s encounter with Misha leads to a tense aftermath, and the two of them hustle to maintain appearances amid growing unease. In a tense wedding day sequence, [Pauline] is confronted about insinuations and Emma’s anxiety peaks as gossip swirls around the guests. In the bathroom, Emma overhears Misha discussing a school shooting with another guest and pulls her into the room to confront the situation. Misha, sensing trouble, blames Charlie by claiming he kissed her first, a revelation that shocks Emma. Charlie makes a clumsy attempt to address the tension with a heartfelt speech about his love for Emma, apologizing for the affair with Misha and urging guests to stop the gossip. The scene erupts as Blake confronts and attacks Charlie, leaving Emma to navigate the fallout.
Emma decides to leave rather than cast doubt on the marriage in front of everyone. After a troubling night, a bloodied and despondent Charlie returns to the pair’s apartment in search of Emma. When he cannot find her, he heads to their favorite diner alone. Soon, Emma arrives and sits opposite him. They reintroduce themselves as if meeting for the first time, and for a moment, they share a hopeful smile before the weight of their recent history settles between them.