Treadstone agents are being hunted down and murdered - and Jason Bourne may be next. Someone high up in the US government is erasing all evidence of Defiance, a controversial mission from Bourne's past - and that evidence includes Bourne himself. Staying one step ahead of killers who have already taken out agents in the US and the Caribbean, Bourne follows a global trail that eventually leads to one of the government's darkest secrets. But exposing the truth about Defiance will also bring Bourne face to face with his arch-enemy, the Russian assassin known as Lennon. For Lennon has been at the heart of Defiance since the very beginning. Now Bourne must face him down the barrel of a gun once more in a final explosive confrontation.