The story began at a man, who loses his memory and wander in the ocean, and then he rescued by an Italian fishing boat. This dying man got two shots, and there has a chip in his buttocks, above the chip has an account number about Bank of Switzerland. Although he lost his memories, he also completely doesn't know his identity and background, but he has some astonishing techniques, including martial art, proficient many languages, and agile self-defense ability.

       In order to find his identity and unties riddles around him, thereupon he took a breathtaking adventurous journey in the European countries. At first in the Bank of Switzerland's safe box, he found various countries' passports, huge money of various countries' currency, a gun, a name, Jason Bourne, and an address in Paris.

       All these were still riddles, soon Bourne found although he doesn't know anyone, but many people recognize him, and these people want to kill him in a minute. When he evades capture, he met a girl named Mary Kreutz, he proposes to pay her ten thousand dollars in the desperate, and the condition is she must drive him to Paris.

       Mary doesn't want accept deal originally, but the money temptation her, and finally she travel with Bourne, this propose also change her life. Bourne thought he can evade quietly, but he still left the clue. His appear tidings also return form Europe to America CIA headquarters of a team, Bourne was a top CIA agent, his duty was to carry out a assassinate mission called ��Treadstone��, when he failed he appear in Europe. His boss in order to keep the secret, he decides to kill him in a minute, thereupon, Bourne had depend on excellent ability to avoid killings and protect Mary.