Lisa Vicari is fantastic as Luna and draws you in with her performance as you go on her journey of grief and fear with her. The film is tense and while it doesn’t do anything greatly surprising with the story, what it does do it does effectively and with great cinematic style. Based on a true story it is a brilliant portrayal of the subtleties of real life espionage.
While there are action scenes, this is not you typical action packed spy movie. It is much more personal than that and is very much about Luna and how the events change her, and also how they don't. As she discovers that her whole life has been a lie we see the childlike innocence stripped away as she becomes a determined young woman with resolve. 'Luna's Revenge' questions where the line is between duty and morals. It also makes a very strong political comment about Russian spies in Germany.
The only downside to this film is that it is essentially straightforward. The story is very well executed but it doesn't do anything surprising or clever, which is the one missing piece of the puzzle that would make it exceptional and a lot more memorable. But otherwise it is a great story and a great film.