About the title
A mysterious masked killer is stalking a group of high schoolers in a small American town. He terrorizes the teenagers and threatens to reveal their darkest, most shameful secrets to the entire town. New girl Makani Young, along with her fellow outsider classmates, begins her own investigation to identify the killer. Everyone becomes a suspect, including themselves. "There's Someone Inside Your House" is an American slasher based on the novel of the same name by Stephanie Perkins.