Movie The Evil Within (2017) description:
After the death of the parents, the elder brother becomes the only friend for a mentally unstable teenager named Dennis Peterson. But the brother is constantly busy, he needs to do his work and personal life, so the young psychopath begins to communicate with his own reflection in the antique antique mirror. Reflection of Dennis from the mirror world is a clever, strong and powerful creature. Besides, it is not a reflection at all, but an ancient demon, eager to break out.
Cast: Frederick Kohler, Sean Patrick Flanery, Brianna Brown, Dina Meyer, Michael Berryman, Francis Guainan, Kim Darby, Tim Bagley, Grayson Turner, Dianna Brooks