Havana Quartet (1999)

Walter, an aspiring musician from Madrid, has a lot of troubles. After finding a videotape, he learns something which will alter his whole life, and put his Madrid problems on hold. In the tape, a Cuban woman confesses to being his mother. She is waiting for him in Havana. Walter goes to Havana to see his mother. There, the plot thickens with the addition of the mother's daughter, and a Spanish airline crew member, who round out the quartet.

Unfortunately the movie Havana Quartet is not yet available on HBO Max.