Birds of Our Hopes(1977)

Amir, 30 years old cinema reporter, lives a great (and probably) happy life between his job and a private life with many friends and Lia, devoted girlfriend and mother of a boy, Timur. One day at the last minute, Lia can't join the group of friends who has planned a trip to the beach. There, Amir meets someone, whom he believes to know already.