In 1697, an exorcism on the young French girl Rapunzel Gothel in Germany failed. The girl was killed, but the demon continued to live in the castle of Father Petrosinus, who carried out the exorcism and sold the building shortly afterwards. Centuries later, one of the last relatives of the priest enters the castle. Alina Grimm and her friends want to shoot their final student film, a horror movie, in the castle. Unsuspecting that their presence will conjure up Rapunzel Gothel's demon again, they roam the castle to take test shots for their project. But the demon wants revenge... and if he can't have the Father, then at least a relative of the same blood.

An international group of film students finds a disturbing video clip on the dark web which seems to contain poltergeist phenomena. Agreed that it's just what they need for their latest documentary project the group travels to the sanatorium shown in the video clip. Once there, they rig up their camera equipment and start to explore the possible ghost activities - until the true horror begins.

There are strange things in the woods... Photographs from the early 1900s were the next confirmed reports, where imagery of Slenderman can be found in classical black and white and sepia imagery. Reports from this time indicate sightings in America, the UK, and Russia, as well as reports of child disappearances. At the shooting we saw and heared strange abnormal things out in the dark woods, half of the team saw something unnatural... We believe in that story about the SLENDER MAN.

1945: The red army stands at the gates of Berlin. In their desperation the Nazis turn to the most obscure Scientists. Through cruel experiments a new secret Weapon has been created - unstoppable and alive. A Russian attack destroys the lab, but the weapon - buried underneath the ruins - is immortal. Lost in time, it lurks in the darkness, only to return again. 2012: Punk-Rock legend Spike Jones leads a group of friends into the ruins of the old Nazi Lab. The complex shall be cleaned up for the reunion concert of his band. Believing they would help a poor soul, they free the beast from its prison. But the creature of the Nazis does not know about thankfulness. Again the smell of blood fills the old laboratories and screams of terror echo through the darkness. As now, the Werewolf starts his war against humanity.