From shadow-haunted Stygia emerges an evil undreamt of by even the most depraved minds: the demi-god called Sefkh. Born of an unspeakable blood ritual, he is the half-human progeny of the ancient serpent-god Set, sent forth to enslave Mankind in the name of his father and return the world to a primordial swamp. The new-born Sefkh leads a fearful army and uses powerful sorcery and a menagerie of demonic war-beasts to break the will of his mortal enemies as he marches forth to conquer the kingdoms of the Hyborian Age, defeating foe after foe — until he crosses the path of an older, battle-scarred Red Sonja, who has exchanged the life of a mercenary for running a school for sword-maidens. Can Red Sonja and her prize students, Lyla and Xoana, defeat the evil Sefkh and his private army of ghouls and devils with the help of a renegade Stygian priest, or are the Hyborian Kingdoms doomed to fall before the pitiless “Son of Set”?