Wounded to the brink of death and suffering from amnesia, Jason Bourne is rescued at sea by a fisherman. With nothing to go on but a Swiss bank account number, he starts to reconstruct his life, but finds that many people he encounters want him dead. However, Bourne realizes that he has the combat and mental skills of a world-class spy—but who does he work for?
When a CIA operation to purchase classified Russian documents is blown by a rival agent, who then shows up in the sleepy seaside village where Bourne and Marie have been living. The pair run for their lives and Bourne, who promised retaliation should anyone from his former life attempt contact, is forced to once again take up his life as a trained assassin to survive.
The most dangerous former operative of the CIA is drawn out of hiding to uncover hidden truths about his past.
Arthur Bishop is a 'mechanic' - an elite assassin with a strict code and unique talent for cleanly eliminating targets. It's a job that requires professional perfection and total detachment, and Bishop is the best in the business. But when he is ordered to take out his mentor and close friend Harry, Bishop is anything but detached.
Professional assassin Chev Chelios learns his rival has injected him with a poison that will kill him if his heart rate drops.
Bourne is brought out of hiding once again by reporter Simon Ross who is trying to unveil Operation Blackbriar, an upgrade to Project Treadstone, in a series of newspaper columns. Information from the reporter stirs a new set of memories, and Bourne must finally uncover his dark past while dodging The Company's best efforts to eradicate him.
Léon, the top hit man in New York, has earned a rep as an effective "cleaner". But when his next-door neighbors are wiped out by a loose-cannon DEA agent, he becomes the unwilling custodian of 12-year-old Mathilda. Before long, Mathilda's thoughts turn to revenge, and she considers following in Léon's footsteps.
Cab driver Max picks up a man who offers him $600 to drive him around. But the promise of easy money sours when Max realizes his fare is an assassin.