Shawshank Redemption

The film portrays Andy spending nearly two decades in Shawshank State Prison and his friendship with Red, a fellow inmate.
Andy is convicted for murdering his wife and her lover and is sent to prison.
The story starts off with how Andy's life changes in prison,how he befriends other inmates and keeps himself busy.
He later takes up the task of filing IT returns of the Jailor,General and other officers in prison to save their illegal possesions.
He later discovers that he is wrongly convicted for his wife's murder and actually his wife was murdered by some other person when a new convict tells him a story of actual murderer's confession in other prison.
So Andy approaches his Jailor and General and spills the beans and pleads innocence.
But the General is not ready to release him because Andy was taking care of the General's illegal possessions,so the general gets the witness murdered.
The story then revolves as to how Andy proves himself innocent and gets out of prison