Stevie Cutter's father vanished on a flight over the South Pacific when she was thirteen. Now thirty years later, when she visits her dying mother in San Francisco she is given her father's diary and plunged into a dangerous chain of events that will change her life forever. In the back of the diary is a hidden message with a clue to her father's fate and a treasure map. But someone else is hunting for the treasure too and in their pursuit, threaten to destroy all that she loves.