A suspicious Naida isn't convinced that their mysterious new ally, Rosalyn, can be trusted. Elsewhere, Sophie gets to know the goblins.

The Goblin King summons a menacing beast to capture Emily and retrieve her grandmother's amulet. Meanwhile, the elves plot to enter Cronan's castle.

Rosalyn reveals the truth about her ties to Cronan. Back at the castle, the Goblin King hatches a plan to use the elves' emotions against them.

With Emily in captivity, Sophie and the elves prepare for the ultimate battle against the Goblin King and his quest for total power.