Cin Perdesi is about the experiences of Arzu and Bora, who are investigating the jinn cases related to terrible murders. Bora, who started to investigate an old mental hospital with his wife, brings to light the terrible murders and jinn cases. He installs cameras in each part of the mental hospital in order to do better research. Meanwhile, Arzu begins to find secret passwords. The police follow the mysterious events of Arzu and Bora from their computers..