When Mai is chosen to take a pilgrimage to the Valley of a Thousand Thoughts to train with the oldest and wisest master of their people, an ancient prophecy is set in motion. The events to come have been predicted but are not unchangeable. When the Starchild returns to the planet of Sage, the foreknowledge of the prophecy begins to gain strength. Four children come together and become linked to the events that lie ahead. In The Age of Akra, the first stage of their journey has them facing the deadly spiderflax, only then to be confronted by a creature of the underworld, an evil Dementra...

In The City of Souls, the pilgrimage to the Valley of a Thousand Thoughts continues. Having already triumphed against dangerous adversaries in The Age of Akra, the four children -- Mai, Long, Akra and Sahib - now face the evil melkarie and must escape to the City of Souls. When they reach the safety of the land of Naroan, in a city hidden under a blanket of living green, the children are confronted with the challenge of locating the Singing Soul. But the underworld is searching for it too, and will do anything to stop the young pilgrims from finding it. The prophecy is at risk of being...

After finding the Silvershade and escaping the attacking forces as the Wilder Forest city was scorched to the ground, Mai, Akra and Kalin must now face the evil that has consumed Long. When they reach the land of Cruscar and enter the ice city of Algus, the children are confronted with an ice challenge to win an audience with Queen Isolda. A treacherous journey now awaits them if they are to reach the Healing Stone to save Long. But Piceptus, the underworld king, will not give up his search and he will do anything to bring the pilgrims' journey to an end. The children grow stronger as they...