At the Arctic Ocean Pillar, Hyoga faces Isaac, an old friend turned fearsome enemy. At the North Atlantic Pillar, Ikki is attacked by Sea Dragon. Could the evil Master of Sanctuary, whom the Knights defeated in their first epic battle, have returned to life? Seiya's beloved partner, Marin, confronts Poseidon and is overwhelmed by his godlike power. What happened 13 years ago to set the Battle of the Gods in motion?