After chasing the monster that kidnapped their mother, Emily and Navin find themselves in a magical world of man-eating demons and shadowy enemies, where they must learn to control an amulet given to them by their grandfather.

"Emily, Trellis, and Vigo visit Algos Island, where they can access and enter lost memories. They're hoping to uncover the events of Trellis's mysterious childhood -- knowledge they can use against the Elf King. What they discover is a dark secret that changes everything. Meanwhile, the Voice of Emily's Amulet is getting stronger, and threatens to overtake her completely"