Sea God Arthur shattered his divine core five years ago to seal the abyss. He wakes to find his five-year-old daughter Lily's glowing blue blood harvested by the Blackwater Syndicate and Sterling family. Returning to Boston as a fisherman, he rescues Lily and dismantles the Sterling empire. As Victor Sterling awakens the abyss god Dagon, Elena wields the Conch Shell, Lily's blood awakens, and Arthur reclaims his full godhood—annihilating Leviathan.