When sewage workers serendipitously discover a discarded and deformed fetus, several collectors of medical oddities vie for possession of it. Subsequently, the fetus, along with others in a collection, come back to life and begin wreaking havoc. The plot offers an interesting premise, as medical oddities are an exotic source of fascination, as well as a dark biological aesthetic which lends itself well to the horror genre, while providing an antidote to the sterile and plastic commercial culture which permeates the mainstream media.
While the viewer may be inclined to perceive the reanimated fetuses as the antagonists of the film, the real antagonists are the collectors - Elvina, Napoleon Lazar, and Dr. Lorca. They can be characterized as such because (1) they seek to obtain the deformed fetuses for their own personal collections, thus gratifying their own egos, whereas such preternatural specimens should be studied by science, or if such specimens are to be put on display, it should be a public exhibition in order to stimulate the intellectual curiosity of the novelty-starved masses. Preferably, they should be in a museum, ideally one that specializes in medical oddities, such as the Mütter Museum in Philadelphia. (2) They are antagonists because they continue their pursuit of the fetuses even after they discover that the specimens are not only alive, but sentient. Therefore, they would exploit the fetuses for their own gain, despite the fact the fetuses express (in the form of writing notes!) their preference to be left alone. This can be symbolic of how businesspeople view the consumer as a commodity - a means of improving one's "bottom line" - rather than as beings with their own desires. The deformed fetuses, therefore, are not antagonists but antiheroes. They only cause trouble once their desire has been disregarded. This film contains some creatively sexy scenes. Regarding sexual content, mainstream films tend to offer little more than mundane male-female sexual intercourse. B-movies often deliver a refreshing selection of uncommon/unnatural sexual scenes, serving to satisfy one's desire for an alternative to routine and unimaginative sexuality. "Hideous!" is no exception, and in fact, the sexual scenes make for some of the most appealing content of this film.
