The film 'People We Meet On Vacation,' directed by Brett Haley and based on Emily Henry's novel, follows travel writer Poppy Wright and her former best friend Alex Nilsen. Poppy, unhappy with her job, travels to Barcelona to reconnect with Alex. Despite their differing lifestyles and a significant argument after confessing feelings, the film explores their journey to find love and whether they ultimately unite. Poppy's encounter with Alex's girlfriend, Sarah, clarifies her feelings, leading her to pursue Alex.