The Romans have left Britain and the land becomes a battleground between the resident Britons, led by King Arthur and the Knights of the Round Table, and the English who originally came to the land as mercenaries in the Roman army.On his death bed, the King fathers twins who find they have amazing powers when together. Persecuted by the Britons for having an English mother, they flee north to find their relatives, pronouncing a terrible curse upon Camelot as they leave.Due to the use of their power, they defeat the invading Picts and are proclaimed heroes.