About a sound designer for films who years ago, while in bed with his mistress, failed to respond to calls for help outside his door. Now during the recording of the audio track for a new film he begins to hear strange noises on his headphones.
A successful "house tuner" in New York City, who calibrates the sound in people's homes in order to adjust their moods, meets a client with a problem he can't solve.
A nightmarish evening unfolds for neighbors David and Robert when they accidentally hit a woman on her bike and flee the scene. While David is increasingly plagued by feelings of guilt, Robert shows no remorse and becomes overbearing and possessive.