Rosso di sera (1989)

Alex is separated and has a young daughter, Elo. After a youth studded with failures at university and in political commitment, he leads a mediocre existence alongside Margit, his new partner, and his friends Pais and Capace. Margit invites Alex to Giangi's birthday party who, in the 70s, was involved in the death of his brother during a student demonstration. Alex discovers that Giangi is having a clandestine relationship with Margit.