At the height of the 'killer clown' phenomenon, psychiatrist Dr Ellen Marks (Jeanine Nerissa Sothcott) and investigative journalist John Parker (Michael Paré) uncover a terrifying conspiracy masterminded by maniacal incarcerated serial killer Carl Cane (Ronan Summers), plotting an anarchistic, uprising from his cell deep in the bowels of the Moreton Downs Psychiatric Hospital. With a murderous army of clowns awaiting his signal to kill, Cane escapes, intent on unleashing his vengeance. Ellen and John face a desperate race against time to avert a bloodbath and stop Cane unleashing his own personal hell on Halloween.