MANDRAKE tells the story of a probation officer who is supposed to oversee the rehabilitation into a rural community of a woman who killed her husband and went to prison for 20 years. The locals think she is a witch, and indeed when the probation officer visits her home, there are unsettling signs everywhere: her house is full of occult objects, she behaves rather strangely, and she somehow knows things, like that the officer has a son (who in the film displays symptoms consistent with cystic fibrosis) and that the father, her ex-husband, is the local police officer. Soon two local kids go missing and everyone suspects the "witch".
The biggest problem with this movie is that it does not make the motivations of the villain clear. What was the reason for the kids' fate? What did the villain ultimately want? What were the plans for the "mandrake baby"? If the two victims in the first part of the movie were meant as a sacrifice, how did the villain not consider the immediate consequences?
Some possibilities are hinted at, but the film does not rally explore them, so they end up being little more than suggestions for a guess. As the movie has a sort of open end, the lack of sense in the motivations of the villain becomes quite annoying. I feel like I spent nearly 1.5 hours watching a a sequence of events play out without understanding what drove it.
I like my villains well-motivated, so to me this is a fairly significant drawback. On the other hand, the film does a good job of going into unpredictable directions, and it is undeniably atmospheric. Fans of horror films which put a premium on atmosphere will like this film, but those who like to understand character motivations will likely feel frustrated.