A family vacation takes a terrifying turn when parents Paul and Wendy discover their young daughter has vanished without a trace. Stopping at nothing to find her, the search for the truth leads to a shocking revelation.
There is something horribly wrong with the bodies found in the dark city streets. Some are mutilated while others have the Price equation (wΔz = Cov (w,z) = βwzVz) carved into their flesh. Detective Eddie Argo and his new partner Helen Westcott unearth the meaning of the odd equation and realise each victim is being offered a gruesome choice: kill your loved ones, or be killed. Before long it becomes clear that the perpetrator has suffered a similar fate and is now coping by seeking a way to solve this philosophical dilemma.
Jason Voorhees is tracked down and blown to bits by a special FBI task force, reborn with the bone-chilling ability to assume the identity of anyone he touches.
A group of friends embark on a camping trip for a ten-year high school reunion. Their celebration soon turns into a battle for survival when they realize that the locals, who are not what they seem, are hunting them down.
Chris and his girlfriend Rose go upstate to visit her parents for the weekend. At first, Chris reads the family's overly accommodating behavior as nervous attempts to deal with their daughter's interracial relationship, but as the weekend progresses, a series of increasingly disturbing discoveries lead him to a truth that he never could have imagined.
When elderly mother Edna inexplicably vanishes, her daughter rushes to the family's decaying home, finding clues of her increasing dementia scattered around the house in her absence.