The story follows Katrina Chambers, making her directorial debut on a coming-of-age short film that’s definitely not based on her tumultuous breakup with the director of photography, Maria Roberts. As if the awkward tension on set wasn’t enough, an evil force starts haunting the production. Filmed in a mockumentary style by Katrina's annoying younger sister, Miranda, Fix It in Post follows the chaos that ensues as the cast and crew are picked off, taunted, and forced to confront a malevolent entity with a thirst for pure havoc.