|Cover Art:||Richard Cowdrey|
|Cover Design:||Steve Scott|
|ISBN Number:||ISBN 9780439405614|
|Previous Book:||The Siege|
|Next Book:||The Burning|
- Soren's sister, Eglantine, is falling under the spell of a strange nightly dream. Then, just as Soren notices her trancelike state, Eglantine disappears, and the dreams become a deadly waking nightmare that puts the Great Tree of Ga'Hoole in terrible danger. Soren must lead the Chaw of Chaws to rescue his sister. Thus begins the next battle between the owls of Ga'Hoole and the evil Pure Ones, deep in the treacherous territory known as The Beaks, where a raging forest fire will prove the greatest danger to the rescuers - and their best hope for victory.
Eglantine had started to have strange dreams of her parents being alive, and in her dreams she recalled Soren and Twilight saying that they were dead. She denied that fact and was awakened by Primrose, Eglantine's hollowmate. Ginger, another hollowmate who actually used to be a Pure One, suggested that they let her sleep. Primrose was shocked by this fact, but Eglantine reassured her that she was having a good dream. This statement started to make Primrose worried for the well-being of her friend and she suspected that something was deeply amiss. Primrose heads to the library where Otulissa is ranting about Dewlap being a traitor. Otulissa tells Primrose and Digger about Shattering and how it's worse than moon blinking. Later, on a flight, Soren, Gylfie, Digger, and Twilight find a page from Fleckasia and other Disorders of the gizzard and takes it back to Otulissa. Soren later has a dream involving the Mirror Lakes. When Trader Mags arrives Otulissa gets a dowsing rod for flecks and a diagram of the owl brain. Suddenly, Soren spots Ginger play with a mouse with Eglantine watching. Soren swoops in and angrily threatens to report Ginger until Eglantine interviens and tells him that Ginger only knew the ways of the Pure Ones who play with their food. Soren takes her back to his hollow and has her sleep there. Later on, he puts her in the infirmery out of the belief that her drowsiness is caused by summer flux. Eglantine later decides that her dreams are real and flies off to the Beaks where she meets an owl that claims to be her mother. After Eglantine falls asleep in her "mum's" nest, alight from the moon shines of a metal mask worn by a owl, revealing that the owl is in fact a Pure One.
When Eglantine wakes up, she finds herself back at the Tree. She heads to the library and finds the books on higher magnetics. She rips out the pages and delivers them to her dream mum. On one such trip, Primrose follows her and gets captured by the Pure Ones. Eventually, Eglantine begins to realize that something is wrong with her and flies back to the Beaks and realizes that her "mum" is really her evil sister in law, Nyra. Back at the Tree, Digger, who had noticed Eglantine's strange behavior, reveals he checked out Eglantine's nest with the dowsing rod and found it full of flecks. They realize that Eglantine has been shattered and discover her gone. Thye set out to rescue her.
Back in the Beaks, Nyra reveals that she has laid an egg. Eglantine snatches it and flys away with Primrose. A chase ensuse and the Chaw of Chaw find the missing pair. To escape, Eglantine is forced to drop the egg, which is destroyed. Afterwards, the Great Tree learns that St Aggie's has fallen to the Pure Ones. To prepare for a final battle with the enemy, the Chaw of Chaws is dispatched to the Northen Kingdoms.
- This is the fifth of six Guardians of Ga'Hoole books to include illustrations of the main and minor characters that appear in the book.
- It is unknown who the owl on the cover is.
- - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - Next Book: The Burning - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -