It is 1910 - Maia, orphaned at 13, travels from England to start a new life with distant relatives in Manaus, hundreds of miles up the Amazon. She is very unhappy with her exceptionally bizarre new family but befriends Finn, a mysterious English boy who lives with the local Indians and shares her passion for the jungle.
The first message sent to Tom Thorne's phone was just a picture - the blurred image of a man's face, but Thorne had seen enough dead bodies to know that the man was no longer alive. But who was he? Who sent the photograph? And why? While the technical experts attempt to trace the sender, Thorne searches the bulletins for a reported death that matches the photograph. Then another picture arrives.