Complex sentence: It is a reworking of the classic Merlin Myth which includes the re-emergence of such themes as the stone, the sword, and the "old queen" in modern-day England.
Split into simpler sentences: It is a reworking of the classic Merlin Myth based in the modern era. It examines the circumstances surrounding the re-emergence of such elements as the sword, the sorcerer's stone and the Old Queen in modern-day England.