After Defne begins to display strange behavior and unusual symptoms following her 18th birthday—symptoms never before seen in the family—her mother Kader reaches out to neurologist Nihat Karahan in hopes of finding a cure.
However, Nihat soon realizes that the case is far darker and deeper than it initially appears.
Seeking help, he turns to Mustafa Faruk Akad, someone he knows from the past and who possesses extensive knowledge of the science of Havas.
Recording all of his research on camera, Nihat Karahan eventually reveals the terrifying events and the dark forces connected to what happened years ago.