While searching for the three remaining artifact keys, Kendra discovers the location of a key to the vault housing one of the artifacts. In order to retrieve it, however, the Knights of the Dawn must venture into a dragon-filled lair known as Wyrmroost.

Since their mother's death, Carter and Sadie have become near strangers. While Sadie has lived with her grandparents in London, her brother has traveled the world with their father, the brilliant Egyptologist, Dr. Julius Kane. One night, Dr. Kane brings the siblings together for a research experiment at the British Museum, where he hopes to set things right for his family. Instead, he unleashes the Egyptian god Set, who banishes him to oblivion and...