When newlyweds Peter and Julie purchase an old house with plans to renovate it, they begin to discover the strangest things. First, they find one of the living room walls covered with iron plates that reveal an expanding sepia stain. Afterwards, they realize that the stain is beginning to take the shape of a man climbing from the darkness under the house. Whenever they paint over the stain, it reappears. The evil events that took place in the house 100 years prior, are becoming the cause of strange occurrences. Soon, the couple is directly threatened by the evil history of their home.

The buttoned-down, superstitious Kay is attempting to lead a normal existence with her new boyfriend Louis. That’s until Sweetie, her rampaging, devil-may-care sister, returns home after an absence, exposing the rotten roots of their family and placing a strain on Kay and Louis’ relationship.