Satyrus and Melitta, twin heirs to a rich kingdom on the Black Sea, become desperate fugitives when their mother, the Scythian warrior-princess Srayanka, is cut down in a savage act of betrayal. Accompanied by their tutor, the Spartan Philokles, they must make a perilous journey west, pursued by ruthless assassins, to find sanctuary with the army of their father's closest friend, Diodorus.