A balaclava clad man strangles and decapitates victims around a remote castle in a quest to retrieve diamonds he believes the man renting the castle has. The finger of suspicion is pointed at everyone with an illegal diamond cutting scheme going on and various mysterious types around. The film is badly edited but it is determined to entertain using horror conventions to tell a crime story. Effective use of misty marshes, secret passages, the unknown strangler and the like liken the film to 1930s old dark house film and while no classic it is enjoyable. One of many West German dark thrillers made in the early 1960s. A special mention for the unsettling soundtrack performed on very early synthisizers and sounding both quaint and futuristic 7/10.
Special Thanks to Mark Coyle for this Movie Review.