In the land of Thra, a young guard discovers a terrible secret about the Skeksis overlords who control the planet -- and its powerful Crystal of Truth.

As Deet sets out on her quest, Aughra awakens from a long journey, Rian flees the castle, and Brea searches for the meaning of the mysterious symbol.

Brea struggles with her unsavory new duties, Deet and Hup get a hostile welcome from the Stonewood clan, and Rian begs his Maudra for help.

While Brea races to solve a puzzle in a hidden room beneath the throne, the Chamberlain hatches a plan to catch Rian and win back the Emperor's trust.

Lore breaks out of his chamber to help Brea. As news of the General's deed spreads, Seladon calls the other Maudras to the Citadel.

At the Circle of the Suns, the weary travelers receive an unsettling surprise -- and a lesson in Thra's history. The Emperor recruits a new army.

While Deet leads Rian on a harrowing journey through the tunnels of Thra, Seladon visits the Castle of the Crystal and sees a new side of the lords.

Desperate to save one of their own, the Skeksis make a deal with Aughra. Rian and Deet continue their search for the Dual Glaive.

As the Gelfling and the Skeksis prepare for a fateful battle, the Scientist starts work on a new secret weapon.