Imposters (4½ Stars)

This is the 15th film in the Stuttgart Nights Festival.

Paul was a policeman in New York. After he was shot in the back and barely avoided death, he quit the police force and decided to start a new life. He moved with his wife Marie and baby son Theo to a sleepy little town.

They hold a housewarming party to meet their neighbours. They leave Theo alone for less than two minutes, and he's gone. Despite an extensive police search he can't be found. Two weeks later a simple-minded man called Orson visits them and says that he doesn't know who took Theo, but they can find him in a small cave in the woods. Against Paul's protests, Marie crawls into the cave. An hour later she brings Theo out. Paul wants to know why she was gone for so long. Marie says she's forgotten what happened in the cave, but it's obvious that she's lying. Having Theo back is all that matters, isn't it? But after a few days Paul notices that Theo's birthmark is missing from his foot, and he knows that something is wrong.

This is a supernatural mystery film. I can't say anything else without giving away spoilers. I need to watch it again.