The evil wizard Maldred has stolen the gold and silver keys which will allow him to release the Naga, the powerful earthquake dragon at the center of the earth--so Drake and several of the other Dragon Masters travel to the Naga's Temple in the Dragon Islands, to try and stop Maldred, and prevent him and the earthquake dragon from destroying the kingdom.

"Tash doesn't want to go to camp, doesn't want to spend the summer with a bunch of strangers, doesn't want to be separated from the only two people she has ever been able to count on: her uncle Kevin, who saved her from foster care, and Cap'n Jackie, who lives next door. Camp turns out to be pretty fun, actually, but when Tash returns home, Cap'n Jackie is gone. And Tash needs her -- the made-up stories of dolphin-dragons, the warm cookies that make...

Melanie Gate, a foundling with a peculiar talent for opening the unopenable, agrees to accompany a gearling automaton named Traveler on his quest to find a home, only to be pursued by the most dangerous wizard in the land and, along the way, discover her true powers.