December 1924, Karl Denke fails to smite Vincenz Olivier with a pickaxe. He would have been his 31st victim. The film thus reconstructs the mind, motivation, and psyche of its main character in intense dialog between him and the inspector.
Madness, mayhem, and mummification rites ensue when a documentary filmmaker visits the rural commune of an Ancient Egyptian inspired cult to interview its enigmatic leader.
After the death of their friend, a group of eccentric young adults are whisked away to a villa on the outskirts of London, but a mysterious entity seems to have followed them to their luxurious getaway.