Deeper, darker, secrets unravel around Moira, Airi, and Belamar as a revolution threatens their quest for Tanari's journal. The boy who hunted Moira on Earth has appeared and time is up. Why did Tanari entrust a simple human girl with saving Skyfall? Who are the mysterious "Four" mentioned in the journal? And why does another Immortal want her, and The Unknown Sun, dead?