Just when fifteen-year-old Bobby Pendragon thinks he understands his
purpose as a Traveler--to protect the territories of Halla from the evil
Saint Dane--he is faced with an impossible choice. The inhabitants of
Eelong are in danger of being wiped out by a mysterious plague. The only
way Bobby can stop it is to bring the antidote from another territory.
Since moving items between territories is forbidden by the Traveler
rules, if Bobby chooses to save Eelong he could endanger himself, his
friends, and the future of every other being in Halla.