Texas Ranger Johnny, poses as a hired gunman called The Dog Town Kid in order to infiltrate the outlaw gang, to uncover a plot by a crooked lawman, Sheriff Bradley, and a large landholder, Jim Morgan against the smaller ranches and the homesteaders.

Cabin fever inspires three friends to create a series of fitness videos. However, things quickly turn dark as a host of supernatural entities including Slenderman, The Rake, and the psychotic HABIT enters their lives to wreak havoc.