Dementia

Having recovered from a shattering emotional breakdown, college professor Ben Marshall relocates to the countryside with his wife and young son, hoping for a fresh start. He has a teaching job lined up and a new home to move into; things finally look to be going Ben's way. Until, that is, he starts to feel that something isn't quite right in the house. Finding himself plagued by spectral visions, Ben becomes obsessed with uncovering the truth behind a local mystery that appears to be putting the lives of his family in danger

Shortly after moving into a dark, brooding mansion, a psychologist and his co-workers are terrorized by a horrible evil being.

A woman recovering from a nervous breakdown tries to convince her husband and and the local London police that she has witnessed a murder in the abandoned house next door.

After an attack renders her blind, Ellen withdraws from the world to recover. But soon she plunges into paranoia, unable to convince anyone that her assailant has returned to terrorize her by hiding in plain sight.

On the surface it's believed to be another urban legend - a supernatural being from the afterlife is violently killing anyone who cheats on their significant other in the small college town of Silvercreek, Pennsylvania. But the town's unusually high suicide rate is finally convincing both locals and college students that everything is not as it seems. When Maeve - a female college student - sleeps with Charlie, the married man of the host family she is staying with, both sense the deadly curse is closing in on them. Unable to get anyone to believe them, Maeve and Charlie seek out a local history student to help find answers and figure out a way to defend themselves. It all comes undone, however, as several people are horrifically killed by the savage being - one-by-one at a rapid pace. Eventually, Maeve, Charlie and the few survivors band together in an attempt to defeat the monster once and for all.