One year after the defeat of Abzu, peace has returned to the world at large. Despite the times, Saori is troubled by dreams that forebode of a terrible fate to befall Seiya. While out one day, Seiya meets a young girl named Pallas and her loyal knight Titan. Meanwhile, on Saori's island, Koga meets a young science-loving boy claiming to be a self-made Saint. When they are attacked by a Parasite, Koga is initially unwilling to fight, still unsure of himself after his previous battles. He eventually decides to, and defeats the Parasite.