The Doppler family has owned this small cabin for decades. Helge Doppler lives here for some time in 1986. By 2019, it has been standing empty for years. Next to the cabin is a metal hatch leading to an underground bunker that was likely built in WWII. It's located just above the tunnel drilled deep into the rocks of the Winden caves. As a boy in 1953, Helge Doppler often plays in the eerie cabin.
In 1986, the bunker is furnished like a child's room with bright wallpaper, a bunk bund, and a small television. There is also a strange device resembling an electric chair in the middle of the room. This is where Noah and Helge conduct their deadly experiments with the missing children. Erik Obendorf and Yasin Friese are sent to 1953 and Mads Nielsen lands in 2019.
Peter Doppler happens to be in the bunker when the boy's body suddenly appears on November 4th, 2019. He calls Mads' father Tronte. They are standing bewildered over the body of the long-missing child when older Claudia Tiedemann enters the bunker. She knew this would happen and convinces Peter and Tronte to put the body somewhere in the forest so the police would find it the next day.
Rift in time
After Ulrich Nielsen knocks Helge Doppler unconscious in 1953, he leaves the boy in the bunker. Helge survives, but is locked in until a rift in time seems to open up. Helge can see into the bunker in 1986 and the face of Jonas Kahnwald, who was being held there by Noah. The moment the boys' hands touch, Helge is hurled to 1986 and Jonas to 2052.