Jennings (Ben Afleck) is the best reverse-engineer in the business. He is hired by clients to take apart other companies technologies and find out how they work. He is hired to do a special job, against the advice of some of his associates. When the job is completed, all memory of what he has been working on is ereased from his mind. That's when his problem really start to begin. He is hunted for something he has no recollection of doing and has only a little time to work it out. He has sent himself 19 seemingly unconnected objects, before his memory was wiped, to allow him to put the puzzle together and discover just what has gone on and what he has done. But the authorities are after him and time is very quickly running out.