The Bourne Identity

Who is Jason Bourne? Is he an assassin, a terrorist, a thief? Why has he got four million dollars in a Swiss bank account? Why has someone tried to murder him?...

Jason Bourne does not know the answer to any of these questions. Suffering from amnesia, he does not even know that he is Jason Bourne. What manner of man is he? What are his secrets? Who has he killed?