Martin (Laurence R. Harvey), a mentally disturbed loner that obsesses over the film The Human Centipede: First Sequence, kidnaps a group of people to create his own 'human centipede' to act out his perverse sexual fantasies. As a child Martin was sexually abused by his father. After seeing the first film he makes a portfolio of images and diagrams from the film. He then masturbates using sandpaper over the film. After his mother confronts him he murders her. Martin then progressively captures more and more people from his job as a car park security guard. Freaking most of his victims out by approaching and then staring at them with his unsettling sharp eyes making them aggressive, which in turn only reminds him of his father, so any thought of backing down goes as Martin becomes more and more insane. After catching all twelve victims he begins to "operate" on them in an underground London cellar by hacking at them with a collection of butchers knives and tools. Once complete he fulfills his sexual fantasies.
