One video has internet users stumped, as they attempt to work out what has been dubbed as the creepiest riddle ever.
The video is thought to be a promotional stunt, yet has the internet community puzzled as they try and crack the code.
At first, you see a hooded figure, presumably supposed to replicate death, that tortures a woman.
However, it doesn’t end there.
After people looked a little closer, they then saw a naked woman, who was bound and gagged, and was seemingly being tortured.
Originally, the video was sent to tech blog called GadgetZZ, and found its way online.
It contains a variety of codes, and images that have been locked away using sophisticated cryptographic technique called steganography.
Theories on what it could be ranged from the sublime to the ridiculous, but the most likely scenario is that it is a promo stunt for Dan Brown’s Inferno, set to be released in October 2016.