As Daniel X continues to hunt for intergalactic aliens, he and his friends go to England searching for Beta, an outlaw who takes the form of fire and who killed Daniel's parents when he was two years old.

In 2083, orphan Shama Katooee, who has just stolen an expensive pet bird, is mysteriously selected to attend the elite Chronos Academy to be trained in the practice of TimeWatch, although she has no idea how or why she has been given this honor.

While Jake continues searching for his father and is sent by the obsidian mirror to multiple times in the past, Sarah and Venn battle with Summer for control of a powerful coin.

Thirteen-year-old Rigg has a secret ability to see the paths of others' pasts, but revelations after his father's death set him on a dangerous quest that brings new threats from those who would either control his destiny or kill him.

Sixteen-year-old Hope Walton travels back in time to help rescue her mother, a member of the secret society of time travelers, who is trapped in twelfth-century England in the age of Eleanor of Aquitaine.

Each of the Travelers returns home to learn the truth about their origins before being reunited for a final, ineveitable confrontation with Saint Dane, whose efforts to control Halla are destroying its very foundations.