"As D.J., Gina, Hilo and Izzy go on another adventure together, Hilo gets even closer to answering the questions of his past. But the shocking answers he gets are not the ones he expected or wanted"--
"After discovering the truth about how he lost his memories and Dr. Horizon's true identity, Hilo goes back to Earth and tries to prevent Razorwark from destroying the world--and everyone in it.".
"When a mysterious boy falls from the sky, friends D.J. and Gina must discover the secrets of his identity and help him save the world"--Provided by publisher.