"Alex doesn't get to have all the adventures-this time, Cleo is going to Alterworld.
Alex is preparing to make another trip into his father's computer when Cleo accidentally touches the screen and emerges amid a battle between the Nez Perce and Blackfoot Indians. Traveling into a myth is miraculous enough, but Cleo is amazed to discover that she can walk in this Alterworld. As Seeloo, daughter of a Nez Perce chief, Cleo also discovers that both great love and tremendous sacrifice may be required of her before she can get home again.