The battle against the Seven General Marinas rages in the underwater city of Poseidon. Seiya has great difficulties in overcoming the power of his first opponent, the Habile Bian of the Hippocampus. But he is not the only one, Shun also has hard to do with the unpredictable Io of Scylla, while Shiryû fights against a Krishna of Chrysaor in the sense of irreducible justice. It is necessary to do fast, the water always fills the Pillar Central and Saori won't hold forever... Will the armors soaked in the blood of the Knights of Gold rise to the height?