After finding a hidden world beneath their ocean, powerful eldsingers Echo and Trace vow to search for others, now with friends to help them. But Trace, worn from a difficult singing job, disappears in a fit of anger to search alone. He finds a hidden reef, but he also finds himself injured and in danger. Fortunately, a group of unusual teens discovers and rescues him.

Soon he realizes this reef has dragons, something considered mythical in Portomare. As Trace heals and his friends and sister arrive to help, the secrets of the dragons unravel, and the eldsingers unearth shocking secrets and terrible hurts surrounding the dragons and citizens of Drekistrond.

Trace might have come to the reef alone, but he will have to work with his friends, both those inside the reef and out, to solve the puzzles of Drekistrond as they fight to restore a race of creatures and save yet another world.