This German horror film follows the story of a young man who discovers his brother is possessed by a demonic force. After a series of strange and terrifying events, he must confront the evil that has taken over his sibling and put an end to its reign of terror. With the help of a mysterious
From Wikipedia
"The Devil's Sooty Brother" KHM 100 is a German fairy tale collected by the Brothers Grimm and published in the second edition of Kinder- und Hausmärchen in 1819. It is a tale of Aarne–Thompson type 475, "Heating Hell's Kitchen", or "The Man as Heater of Hell's Kettle".