A cursed beast-king, Lucian of Aethelgard, seeks a cure for his affliction at the underwater temple of Seraphina, a centuries-old siren goddess guarding a magical liquid called the Tears of the Azure. Their meeting is prophesied, and their fates are intertwined with a rare eclipse flower guarded by Seraphina's lost love, Lysander, who was secretly cursed to be the guardian.