This movie is definitely one of the scariest movies I've ever seen. It's about this childlike, pity evoking man (brilliantly played by Peter Lorre), who also happens to be a psychotic child killer. The city in which he lives is, of course, panicked by the mysterious child-killings, and both the criminals and the police starts to haunt the man down. I won't reveal more then this, but I will say this: Just because it's an old movie, don't let your guard down. This movie is one of those rare movies, which are so good that you'll never forget them.