Cyberbunker: The Criminal Underworld is a fascinating true-crime documentary that explores the strange intersection between cybercrime, the dark web and an enormous Cold War-era bunker hidden beneath a peaceful German town. Released on Netflix in November 2023 and directed by Kilian Lieb and Max Rainer, the German documentary runs for approximately 101 minutes. It tells a remarkable real-life story that often feels more like the plot of a technological crime thriller than a documentary.
The documentary centres on Herman-Johan Xennt, an eccentric Dutchman who, together with a group of associates, takes control of a former NATO bunker beneath the picturesque German town of Traben-Trarbach. Xennt promises that the enormous underground facility will become a successful data centre and create employment opportunities. However, local residents become increasingly suspicious of the mysterious group operating beneath their town. The bunker eventually becomes associated with internet infrastructure used by parts of the online criminal underworld, attracting the attention of German authorities.
One of the documentary’s greatest strengths is the contrast between its setting and subject matter. Above ground is a quiet and attractive tourist destination; beneath it is a heavily protected underground facility connected to some of the darker corners of the internet. This unusual setting immediately gives the documentary an unsettling atmosphere and makes the true story particularly memorable.
Xennt is also a central figure. The documentary allows viewers to hear from people connected to the operation as well as investigators, journalists and local figures, providing different perspectives on what happened. Rather than presenting cybercrime entirely through technical explanations, the filmmakers concentrate on the personalities and events surrounding the bunker, making the story accessible even to viewers without extensive knowledge of cybersecurity.
The investigation itself provides some of the documentary’s most suspenseful moments. As authorities attempt to understand exactly what is happening inside the bunker, the film gradually develops into a real-world police thriller. The enormous underground structure creates an additional challenge, and the eventual investigation demonstrates how difficult it can be for law enforcement to confront criminal activity supported by sophisticated internet infrastructure.
The documentary also raises interesting questions about online anonymity, responsibility and freedom on the internet. The people behind CyberBunker portrayed themselves as defenders of an unrestricted internet, while authorities viewed the infrastructure as facilitating serious criminal activity. This conflict gives the documentary more depth than a straightforward story about hackers being pursued by police.
Cyberbunker: The Criminal Underworld is an intriguing and unusual true-crime documentary that transforms an underground data centre into the centre of an international cybercrime investigation. Its combination of eccentric personalities, dark-web activity, police investigation and an extraordinary Cold War setting makes it particularly engaging. For viewers interested in cybercrime, hackers, technology or unconventional true-crime stories, it is a worthwhile and thought-provoking watch.
RATINGS:
IMDb: 6.4/10
Rotten Tomatoes: 95%
StreamTV: