Charles, a charming yet commitment-phobic Englishman, attends the wedding of friends Angus and Laura, accompanied by his tight-knit group of friends. At the wedding, he meets Carrie, an American woman, and is immediately smitten by her lively personality. Despite sharing a passionate night together, Charles hesitates to pursue a deeper relationship, thinking their encounter was merely a fleeting romance. He learns that Carrie has a fiancé, which leaves him disheartened but unable to forget her. As their social circle continues to celebrate multiple friends' nuptials, Charles repeatedly encounters Carrie, who remains entangled in his thoughts and emotions.

At subsequent weddings, including one where Carrie herself gets married, Charles grapples with his feelings as he watches his friends navigate their own romantic endeavors. The weddings serve as pivotal social events that force him to confront his fears of commitment and his deepening affection for Carrie. Concurrently, his friends face their own love-related challenges and celebrations, painting a broader picture of love's complexity and unpredictability. Throughout these events, Charlie's internal conflict and decisions about love and commitment reach a crucial point as he reflects on what he truly wants in life.