In nineteenth-century England, a powerful sorcerer and King of the Goblins chooses Kate, the elder of two orphan girls recently arrived at their ancestral home, Hallow Hill, to be his bride and queen.

After the mostly human Emily rejects the elvish Seylin's marriage proposal, both undertake separate quests to learn about their true natures and discover a royal elf and orphaned goblin to bring to the goblin kingdom.