Lisa thought her trip to the dentist would be nothing special. A chipped wisdom tooth was giving her discomfort and once it was removed, she'd be free of pain and free to carry on her mundane existence with her overbearing mother. A life made all the more miserable by her awkward appearance among her peers at school. Little did she know a new tooth would appear in the empty space in her mouth. One with a foul mouth and murderous intentions. Lisa soon finds there's a paper thin barrier between reality and insanity.