Jason Bourne (Matt Damon) is a barely alive amnesiac with a pair of bullet wounds in his back, pulled from the Mediterranean by Italian fishermen. Bourne's only clue to his own identity is a bank account number etched on a capsule implanted in his body.
He quickly finds the Zurich bank where money, a gun, and a few identification documents await, but after he's pursued by security goons at the American consulate, Bourne realizes he can trust no one and offers a German gypsy named Maria (Franka Potente) ten thousand dollars for a ride to Paris.
Encountering more professional killers bent on his destruction, Bourne discovers that he possesses a surprising degree of skill in combat, martial arts, and linguistics; handy talents that clearly indicate his past includes work as a spy and assassin, but for whom? With Maria's reluctant help, Bourne edges closer to the truth, something CIA officials want concealed at all costs.