He was the perfect weapon until he became the target.
During a stormy night, a group of Italian fishermen find a man floating in the Mediterranean Sea off Marseille, with two gunshot wounds in his back and a device with the number of a Swiss bank account embedded in his hip.
Suffering from retrograde amnesia, he finds he is versed in several European languages and can perform uncommon tasks such as sea navigation and tying exotic knots in the ship's ropes, but he cannot remember anything about himself or how he got there.
When the ship docks in Oneglia, he sets off for Zürich to investigate the bank account. At the bank in Zürich, the man opens his safe deposit box to find several passports containing his picture, large amounts of assorted currencies, and a 9mm handgun. Still with no idea what his real name is, he assumes the one from the first US passport, Jason Bourne.