Total Recall

Douglas Quaid is a bored construction worker in the year 2084 who dreams of visiting colonized Mars. He visits "Rekall," a company that plants false memories into people's brains, in order to experience the thrill of Mars without having to travel there. But something goes wrong during the procedure; Quaid discovers that his entire life is actually a false memory and that the people who implanted it in his head now want him dead.