Gabrielle Lord

Hunted by the law and ruthless criminals, fifteen-year-old Cal must somehow uncover the truth about his father's mysterious death and a history-changing secret.

Trapped with a train bearing down on him, Callum Ormond's chances of survival look grim; all the clues to the Ormond Singularity lead to more puzzles and more danger.

Having lost the Jewel and the Riddle, Cal now finds himself buried alive in a coffin and Boges and Winter are trying to find him before it is too late.

Cal agrees to work as an undercover agent for SI-6 to discover the whereabouts of his twin, but at an island getaway for troubled teens, Cal discovers that things are not as they seem.

Back in the city, Cal needs Boges to make a perfect copy of Oriana's fingerprint and he needs her PIN to get into her safe at Zurich Bank; but stealing from Oriana may force her into a lethal alliance with Sligo, doubling the power of Cal's enemies.

As the December thirty-first deadline approaches, Cal's enemies are closing in from all sides; he's so busy trying to save himself he may fail to save a friend.

Hoping to find the Jewel and the Riddle in a safe deposit box rented by Oriana de la Force, Cal Ormond collects her fingerprint to access the box but is caught and left in Dry Bones Valley, where two prospectors attempt to capture him for the reward money.