Wikipedia's synopsis of There's someone inside your house:
Makani Young is still adjusting to her new life in the small town of Osborne, one year after her parents sent her away from Hawaii to live with her grandmother in rural Nebraska. Though, she befriends a few friends and even flirts with a romantic interest at Osborne High, she is still haunted by the secrets of her past life. Sometime later, the students at her school die in a series of gruesome murders. As the terror grows closer and the hunt intensifies for the killer, the dark secrets of the past will finally be revealed.
Mr. Patrick Brice ( Creep, The Overnight) will direct the feature. Mr. Henry Gayden(Shazam!) will write the screenplay, while Mr. Judson Scott and Brendan Ferguson will be executive producers.
Sydney Park ( Pretty Little Liars: The Perfectionists) gets the lead role. Meanwhile here are the individuals on the call sheet: Theodore Pellerin, Dale Whiblery, Jesse LaTourette, Asjha Cooper, Burkely Duffield, and Diego Josef.
As of yet Netflix hasn't announced when production will start.
Source Material: hollywoodreporter.com