The 21st Century. Information is the ultimate commodity. The most valuable of information is transported in Mnemonic implants in the heads of professional couriers like Johnny (Keanu Reeves), who offer both security and confidentiality for the right price. But Johnny has paid a heavy price of his own - he's dumped his own memories to make room for the programmes he smuggles. To buy them back, he agrees to deliver priceless data, the most important data of the 21st Century, data that has already set an army of professional killers on his trail. But the massive upload is too much for his brain and Johnny must find the secret codes to download the information - or die.