Based on Robert Ludlum's novel, the film tells the story of a man found in the middle of the sea. This might not seem extraordinary, except for the fact that our protagonist suffers from memory loss. In a bank vault (the number to which was implanted in his back), he finds many strange and incomprehensible items, as well as a name: Jason Bourne. Soon after, he realizes that someone clearly wants to eliminate him. While on the run, he crosses paths with a German woman who gradually gets drawn into his world of espionage and intrigue, whose mastermind Bourne still doesn't know. He follows the clues, one by one, in search of his lost identity.