For years, fans of "Avatar: The Last Airbender" and "The Legend of Korra" have burned with one question - what happened to Fire Lord Zuko's mother? Finding a clue at last, Zuko enlists the aid of Team Avatar - and the most unlikely ally of all - to help uncover the biggest secret of his life. Written and drawn by the creative team behind the bestselling "Avatar: The Promise", Gene Luen Yang and Gurihiru, in collaboration with "Avatar" and "Korra" creators Michael Dante DiMartino and Bryan Konietzko, this is the perfect companion to "The Legend of Korra"!