It is estimated by historians that British mathematician Alan Turing helped, through his contributions at Bletchley Park, shorten World War II by at least two years. This movie his about that period of his life, though the beginning is set at the time of his arrest for gross indecency", the charge then in vigor in the UK for being homosexual.
The movie does not pretend to be an historical account nor a documentary on Turing's life, and as such viewers familiar with the "real" Turing will found some elements to be inaccurate. It is however a good story that proves I thoroughly enjoyed.
And the violent content was very limited, for a change.