Chris Stuckmann’s Shelby Oaks has added horror heavyweight Mike Flanagan. According to Deadline, Flanagan will executive produce under his Intrepid Pictures banner alongside partners Trevor Macy and Melinda Nishioka. The supernatural horror follows Mia (Camille Sullivan) as she frantically searches for her sister Riley (Sarah Durn), after she ominously disappeared in the last tape of a group of paranormal investigators called the Paranormal Paranoids. As Mia’s obsession grows, she begins to suspect that the imaginary demon from Riley’s childhood may have been real.