17-year-old Winnie Flynn, a closet horror fan with a starkly realistic worldview, has never known her mum's sister, Maggie: a high-profile reality TV producer. But in the wake of her mother's suicide, Winnie is recruited by Maggie to spend a summer in New Jersey, working as a production assistant on her current hit. At first Winnie figures that she has nothing to lose; her father has checked out, and Maggie is the only family she has left. But things get increasingly weird on set as Winnie is drawn into a world of paranormal believers and non-believers alike.