The Remains from the Shipwreck(1978)

Whatever his reasons or intent, when the young man carrying a cello begins working at the old-folks home, he strikes up an acquaintance with the man known as "the Maestro" (Fernando Fernan Gomez), who is full of plans to produce a play based on a Caribbean love affair and adventure in his youth. As he listens to the old man's reminiscences of love, he thinks of his own girlfriend (both are played by Angela Molina). Eventually, the beloved eccentric's play is produced, accompanied by the boy's cello music.