Avatar / Yang, Gene Luen

"The shadowy spirits known as the Kemurikage are abducting children throughout the Fire Nation Capital, sowing widespread fear and panic in their wake. Desperate to determine what has angered these spirits, Aang and Zuko search for clues deep in the Dragonbone Catacombs underneath the Fire Sages Capital Temple. Can they uncover the hidden history of the Kemurikage and solve the mystery in time, or will more children be taken?"--Back cover.

"When Azula is discovered to be the ringleader of the shadowy Kemurikage, Aang and Zuko will stop at nothing to chase her down and rescue the children--even if it means turning on each other! As Zuko locks down the capital to find her, riots erupt in the streets and the citizens are on edge. An unexpected clue from Mai and Ty Lee will help Team Avatar uncover Azula's plot, which is more sinister than they could have imagined. Will they stop her in time?"--Back cover.

When the Fire Nation begins to believe that the country will perish if Zuko stays in power, Avatar Aang and his friends must protect the ruler.