Eternal Shadows follows Lucien, a ruthless vampire king, who lost his human soulmate Amara centuries ago. His grief and refusal to drink blood have left him weak, until Seraphime—who looks exactly like Amara—arrives as a political pawn. As Lucien's bloodlust resurfaces, he discovers Amara is Seraphine reincarnated. Together, they must confront their shared past and the dark forces that threaten to destroy their future.