The third epic cycle of Wolfgang Holbein. The young magician Robert Craven, heir to a powerful sorcerer from Salem, is again involved in the struggle of the Great Elders, who have set their goal to conquer the whole world. But now their mortal battle takes place in the depths of the sea, where Degon, the amphibian god, rules, who is opposed by the unforgettable Captain Nemo and his fantastic ship, the Nautilus. It seems that the winner will be the one who manages to properly use Andara's magical amulet and will become the owner of the Seven Seals.