Cal screwed up. He trusted the wrong guy. Wendy almost died and Shelter fell. In an attempt to assuage his own guilt, Cal joined a dangerous mission to lead the Primate’s people away from the survivors. While laying a false trail for the Primate’s Skinnies, Cal discovers some old friends, but he also finds an enemy even more dangerous than the Primate. Now the group must decide if their objective has changed. Cal will do anything to prove to the others, and maybe himself, that he’s not a traitor. But will it be enough to keep his friends safe?