Graystripe and Millie have finally found ThunderClan's old territory, but Twoleg monsters have devastated the forest and Graystripe fears that all of his Clanmates have been killed or captured by Twolegs. Millie insists that they keep looking, and an old friend helps point the two cats on the path that the Clans followed many moons ago.

But danger still lurks around every turn, and Graystripe worries that he and Millie are lost on an impossible journey.