On Snake‑Spine Isle, young Elowen is framed by her stepmother and cast into the deep sea as a sacrificial offering. By chance, she awakens Seraphin, the ancient Sea‑Serpent King bound by a thousand‑year petrification curse. Elowen carries the bloodline of the primeval divine herb, and her blood can suppress the curse afflicting the Serpent King. What begins as coercion and mutual exploitation evolves, through suspicion, assassination attempts and life‑and‑death ordeals, into deep‑rooted love as they stand together against dark forces.
The power‑hungry Elder Vilen colludes with land‑dwelling hunters to unleash the Abyss Soul‑Eater, a sealed ancient evil, throwing the deep sea into utter chaos. After Elowen conceives, the child in her womb inherits powers from both the divine herb lineage and the sea‑serpent royal blood, becoming the key to breaking the curse. Conspiracies, ambushes, monster incursions and hunter assaults assail them one after another. Nayra, the lady‑in‑waiting who once persecuted Elowen out of unrequited love for Seraphin, sees the truth at last, repents, and chooses to fight for the kingdom.
Prince Saen is born, bearing primal ancestral radiance that inflicts heavy wounds upon the evil entity. To eradicate the thousand‑year curse for good, Elowen and Seraphin venture into the perilous mausoleum of former kings to retrieve the ancient scepter. United with the Heart of Seaweed, they destroy the Abyss Soul‑Eater. With the crisis resolved, land and sea abolish t