Parapax (2007)

A physics professor, a sci-fi writer and a young writer from parallel universes find that their lives are entangled. She thinks she is a replicant of her real self, she is the imprisoned soul in her novel, and she is the mastermind behind all. This is an author's movie about authors, this is a science fiction movie about science fiction, and this is a movie about movies. What kind of existence is our world, and whether our life is existence or nothingness?