The trailer introduces Jane, the main character who has been a bridesmaid 27 times but has never been married herself. It reveals that she meets Kevin, a man who does not believe in marriage, and he helps her while she continues to support her friends' weddings. Scenes show Jane and Kevin interacting at a wedding and discussing her many dresses. The trailer establishes the film's romantic comedy genre through its use of pink fonts, blue backgrounds, and lighthearted dialogue between Jane and her friends about relationships and marriage. It concludes by announcing the film's release date in the style of a wedding invitation.