The land is under the cruel thumb of Manneryjay (Olivia Hussey) and her henchman Lord Vultare (David Warner). A secret society of good knights (called the Delta Knights) is seeking secret knowledge of Atlantis to give them the power to bring down Maydeed and company.
The Delta Knights agent is Raydoor (somewhat confusingly also David Warner) who finds a young man called Tee (Corbin Allred) who may be the person prophesied to discover the secrets of Archimedes, though Leonardo de Vinci (David Kreigel) is also called upon to help...
This is an amazingly bad film with a plot which makes little sense, cheap sets, cheaper acting on the most part. It does have a strange camp charm though and some of the situations and dialogue are so ridiculous you can't help but laugh (unintentionally). What were they thinking?