Malibu Horror Story follows a team of amateur paranormal investigators as they delve into a 10-year-old unresolved case. The case revolves around the disappearance of four popular high school boys who went missing on graduation night. While exploring a sacred cave in the hills of Malibu, California, the team encounters chilling paranormal occurrences. Upon analyzing footage from the missing teens' camera, they make a terrifying discovery revealing an ancient curse that forces them to confront their worst fears and unravel the sinister truth behind the boys' vanishing.