Famed Explorer of the Realm Alexander West is presumed dead in the Fazian rainforest when a mysterious man with a clockwork hand leads Alexander's son Kit to half of a strange map. Soon Kit, his brother, Zander, and his sister, M.K., are on their way to a remote canyon in the Arizona desert, pursued by government agents and on the trail of a fabled treasure in gold. As danger of all kinds closes in on them, the Expeditioners must use all of their smarts and talents to follow their father's map, no matter where it leads them.