Almost a year after the events of II, Erica and Kevin have fully settled into the new normal. However, when the two both receive ominous warnings with one of them resulting in horrific murder Erica and Kevin are once again thrust into an often bizarre and disturbing scenario. As a washed up musician plans on summoning a vengeful evil against those who have wronged him Erica and Kevin must take one final stand for their town and humanity as a whole.