We meet three types of faeries in the story: Unseen (able to disappear), Lights (able to emit bright light), and Trolls (bad-tempered faeries with no special abilities). Although Light and Trolls reside in the nearby forest, Unseens live hidden inside a large house with humans.

In Part One, brother and sister Unseens, Glemce and Faze, venture into the forest and meet forest Lights, and then live among them to bridge the gap between the two typs of faeries. Dirty, bug-eating Trolls, however, present a constant threat to the other tiny winged forest creatures. (Depictions of Trolls range from humorous to horrific, making them perpetual scene stealers.)

Part Two takes place many year later and introduces the next generation of faeries. Sage, the new Faerie Queen, unites all magical forest creatures - making friends of Unseens, Lights, and Trolls.

Part Three - an abrupt change in focus rather than time - emphasizes human interactions with faeries and with each other. Able to shape-shift into human and animal forms, Sage befriends Thomas, the man who owns the house in which Glemce, Faze, and other Unseens were raised, along with the land Lights and Trolls call home. Together, human and faeries fight and evil witch with murderous intentions.