A series of brutal, cult-like murders are taking place at a New England college. Josh Greene, a shy freshman, is the lone survivor of a series of murders that are reminiscent of a similar string of killings some twenty years prior. As he seeks to uncover the secret behind the attacks, he is joined by Detective Forrester, who was instrumental in halting the bloodshed before, and his daughter Meg, who had barely escaped being a victim previously.

Mark Fisher disappeared from his home in a brilliant flash of blue light almost two years ago. His friend Seth Hampton was the last to see him alive. Now a string of grisly, violent murders leads Seth to believe that Mark is back, and something evil is living inside of him.