June 2003. The world is still on fire in the aftermath of 9/11. Fresh from the bloody conflict of the Second Gulf War, SAS soldier Ben Hope returns to Britain for some R&R leave, only to find himself embroiled in an intrigue deadlier than anything he's encountered on the battlefields of Iraq. When a passenger aircraft piloted by Ben's former army comrade Nick Chapman crashed off the Cayman Islands killing everyone on board, the official line was that Chapman committed suicide. But things don't add up, and Ben's old friend is barely in his grave before unfolding events point to something far bigger and more sinister going on. What did Chapman witness that powerful forces would do anything to suppress? Who was the mysterious 13th passenger on board the doomed flight?