The film Johnny Mnemonic is the science fiction story
about a futuristic messenger of information who encounters trouble when he
receives too much information that is very valuable. Keanu Reeves plays the
character of Johnny in the movie. Johnny has had a computer memory chip put into
his head in order to increase his memory. To place information into his chip it
must be input via computer through a input jack in his head. Johnny is hired as
a messenger to deliver the cure for a disease of the nervous system called NAS to
a pharmaceutical company called Pharmacom. When Johnny loads the information
into his head, his chip is overloaded with data. Overloaded data is dangerous
due to sepage of the information into his head. The sepage is fatal for Johnny
in approximately three days if he isn't killed before that. There are groups
that would do anything to get the information out of Johnny, even go so far as to
cut off his head to get the data. The problem for Johnny is that when he
receives a download to deliver he doesn't know what the information is. It is
downloaded into the chip in his head with a password made up of three random
images from the television and uploaded with the same images of which Johnny does
not know. Johnny has only one chance to stay alive. He has to find out the
password and get the information out of his head and into the right hands before
sepage kills him or "headhunters" find him. It is a game of cat and mouse and a
race against time.