A writer who studies the paranormal believes that low frequency tactile sound is the cause for reported ghost sightings in an abandoned subway station. In an attempt to debunk the sightings, she breaks into the station to record evidence.
A female cop is gunned down and wrongly accused of using excessive force in a hostage rescue attempt. Maniac cop returns from the dead once more to seek revenge, destroying everthing and anyone that stands in his way.
