Visiting her grandmother in Australia, Livy, ten, is reminded of the promise she made five years before to Bob, a strange, green creature who cannot recall who or what he is.

A girl is lost in a snowstorm. A wolf pup is lost, too. How will they find their way home?

Lyra and her daemon hurtle toward danger in the cold, far North, determined to rescue the children held captive by the notorious and cruel Gobblers. Her difficult journey to uncover the truth will lead her to encounter fierce Gyptian fighters, mysterious flying witches, and the mighty deposed king of the armored bears, lorek Byrnison.