Stalker is a Russian science fiction film directed by Andrei Tarkovsky. It takes place in a post-apocalyptic world where a guide, known as a Stalker, leads two men into a mysterious and dangerous area called the Zone. The film explores themes of existentialism, spirituality, and the nature of reality. Stalker is a visually mesmerizing and intellectually stimulating movie that challenges viewers to contemplate the deeper questions of life and existence.