In the rural farm town of Appleton, Wisconsin, a harsh winter has set in and a rogue figure named Mitchell has returned to the town he once terrorized. Maddy Ballister lost her father at the hands of Mitchell and now she's ready to find him and settle the score.

A psychology professor begins a case study with three subjects who are suffering from sleep paralysis. As the study goes on, what is real and what is dream become mingled with violent consequences.