Maybe (1999)

In 2000, Arthur receives a New Year's Eve party invitation that unexpectedly changes his life. As he considers his future with his girlfriend Lucie, particularly their decision about having children, he discovers a hidden passage in the party bathroom. It leads him to a future Paris, where he meets an elderly man named Ako who claims to be his son.Ako explains he's lived in this alternate world, separate from the present. He tells Arthur that Arthur must decide whether to bring him into existence or lose him completely. As Arthur struggles with his own uncertain life, Ako’s presence highlights the impact of personal choices.When Ako accidentally reveals the passage during the party, the two worlds collide. Arthur is forced to confront the consequences of his decisions and consider his own potential for change. The film examines themes of personal growth, family, and the importance of choices as Arthur questions what truly matters in finding happiness.