El cassette final

In a hardly recognizable modern city, Marta is grabbed by a strange, unfamiliar young man. He gives her an odd cassette tape. When Marta listens to the cassette, she is taken on a nostalgic journey to a time that no longer exists, other than in her grandfather's memories. The man has one last warning for Marta and society, that the salvation of humanity could be on the old cassette.