I Know You're in There (2016)

When his mother commits suicide, Tom Redding discovers he has a long lost sister who cannot move or talk. Together they travel to their dead mother's isolated home where Tom hopes to document his sister's illness, only to be driven to the brink of madness by a supernatural evil.

Director: Robert Lawson Gordon

Cast: Mindee de Lacey, Will Hurst, Wyoh Lee, Grainne McDermott, Blake Newcomb, Minae Noji, Jaimes Timas