After declining Prince Sozin's request for help reclaiming a Fire Nation island with legendary powers, Avatar Roku absconds from his airbending training to investigate, learning what it means to be a spirit of no nation.

"As the two sides prepare for an apocalyptic battle, Eiric, Reginn, and Liv find allies and enemies in unexpected places and draw on new strengths as they seek to prevent the destruction of the last of the Nine Worlds"--Provided by publisher.