To make it short it's mix between Batman and 1984 ( ), with a "hint" of government conspiracy theory and psychology (I say no more for those who would like to see it) ...
A sentence from the movie:
"A people should not fear its government, but a government should fear its people"
Summary of allociné:
London, at the XNIXXth century ...
Evey Hammond does not want to forget anything about the man who saved his life and allowed him to dominate his fears the farthest. But there was a time when she aspired only to anonymity to escape an omnipotent secret police. Like all her fellow citizens, she was too quickly submissive, she accepted that her country had lost her soul and had given herself en masse to the tyrant Sutler and his followers.
A trailer
To see, really ...