Lullaby Lake

Their magical map is leading Tag, Skyla, and Blaze closer and closer to The Shadowlands, Thorn's territory--but now the Ember Stone has fallen into the well-named Lullaby Lake, which is defended by fairies who sing intruders to sleep, and the friends must figure out a way to convince the "nixies" to help them retrieve it before Thorn gets his claws on it.