The trailer for "What Happens Later" shows that the film centers on two ex-lovers, Bill (David Duchovny) and Willa (Meg Ryan), who get snowed in overnight at a regional airport, indefinitely delayed by a storm. Despite years apart, they find themselves as attracted to and annoyed by each other as they were decades earlier. As they spend the night together, they unpack the mysteries of their past relationship and compare their current lives to the dreams they once shared. They begin to wonder whether their reunion is just a coincidence or something more magical and meaningful

. The story unfolds mainly through their dialogue, revealing old feelings, regrets, and the bittersweet nature of reconnecting after many years. The film explores what happens after the typical "happy ending" of a romance, with a reflective and sometimes melancholic tone. It is a romantic comedy that takes place almost entirely within the airport setting, focusing on the emotional interaction between the two characters

. In essence, the trailer suggests a blend of humor, nostalgia, and emotional depth as the characters confront their past and consider the possibilities of their future together