Sarah and Josh McLaren are a young married couple living in suburban Las Vegas. Shortly after a car accident, Sarah begins to suffer a series of disturbing memory lapses and frequent blackouts that seem to be increasing in intensity. Unsure of what is happening, and feeling as though she is losing her mind, Sarah comes to learn she is pregnant. To add to her shock, she subsequently discovers that her husband is sterile. As her marriage and world begin to fall apart, she makes a desperate attempt to find the truth by planting a hidden camera in her home. What she discovers is both horrific and life-altering and involves a dark secret about her neighbor Dale that proves to be even more far-reaching than anyone could imagine.