A man is found floating in the Mediterranean Sea with two gunshot wounds in his back and a device with the number of a Swiss safe deposit box embedded in his hip. Upon reaching shore, the man assumes the name Jason Bourne after finding passports under the name in the safe deposit box, along with other international passports, large amounts of assorted currencies, and a gun. He subsequently attempts to discover his true identity whilst countering attempts on his life by CIA assassins, eventually realizing that he is one such assassin who failed to complete his most recent mission. Bourne breaks his connections to the CIA and reunites with Marie Kreutz (Franka Potente), a woman who had helped him learn about his most recent actions prior to his memory loss.
