In 1897, a young widow returns to the family farm where she discovers her late husband's attempt at building a primitive sentient machine.

An interracial lesbian couple commit a murder and have to flee for their lives.

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.