As Avatar Aang and his martial arts friends seek answers to the mysteries surrounding a refinery on land sacred to the Air Nomads, Toph uncovers a startling truth about her father’s involvement with the refinery, while Aang travels to the spirit world, discovering a secret as surprising as it is dangerous.
By Bryan Konietzko, Tim Hedrick, Gene Luen Yang, Micheal Dante DiMartino and Gurihiru.