Britain, the distant V century. King Uther Pendragon dies, the spouse, and he has a legitimate daughter of Morgan and illegitimate son of Arthur. The daughter is removed to the monastery, where masters secret art of black magic.
15 years after the death of the king, Morgana returns to the Royal castle to take the throne, but the scepter also claims her half-brother Arthur. Between the two contenders is set for a bitter struggle for power. Morgan calls to his aid all the forces of evil, but on the side of Arthur's powerful wizard and magician Merlin. Meanwhile, Arthur falls in love with a beautiful maiden Guinevere, and, having won the Kingdom, he will be able to offer her not only the hand, but the crown.