Maya is hiding in plain sight in London. The twenty-six-year-old has abandoned the dangerous obligations pressed upon her by her father, and chosen instead to live a normal life. But Maya comes from a long line of people who call themselves Harlequins - a fierce group of warriors willing to sacrifice their lives to protect a select few known as Travelers. Gabriel and Michael Corrigan are brothers living in Los Angeles. Since childhood, the young men have been shaped by stories that their late father was a Traveler, one of a small band of prophets who have vastly influenced the course of history. Travelers are able to attain pure enlightenment, and have for centuries ushered change into the world. Gabriel and Michael, who may have inherited their father's gifts, have always protected themselves by living 'off the Grid' - that is, invisible to the real-life surveillance networks that monitor people in our modern society.