Under Guardian William's rule, the people of Alsace huddle in castles, dreading the next attack of the Gemstone Wyverns.

After one of the wyverns steals a valueable diamond, Josh Wyrmherd is accused of helping the drake and exiled. With his friend Alyson, they search for the diamond and make their way to a mountaintop eyrie, where thousands of wyverns nest.

There, they discover a secret that will change their lives and shape the future of the whole kingdom.