When the Purwells set out to explore the land of the real King Arthur, they find themselves caught up in a hunt for the Moon Stallion, a beautiful but dangerous beast without mortal master. Mortenhurze, Purwell’s patron, wants revenge. Todman, a horse warlock, has more sinister intentions. Both men seek to capture the mysterious horse, so that its magic powers will become theirs to command.
But they are no match for the dark forces of myth and magic which still exist among the Berkshire hills. Only Diana, who is blind, is allowed a glimpse of the truth. With Merlin’s help, she learns that the Moon Stallion is beyond the reach of ambitious men. It is part of a legend which unites past, present and future…
Based on the 1978 BBC Children’s fantasy drama starring Sarah Sutton, John Abineri, and David Haig.