Rebellious teen Amy defies her parents by going to a trashy carnival that has pulled into town. Together with three other friends, Amy spends the night in a carnival funhouse and is stalked by a deformed man in a Frankenstein mask.
With its two-headed cow, mutant baby in a jar, jokes about bestiality, references to 'Bride of Frankenstein' and misbegotten monster, this is very much a horror movie that contemplates, with awe and terror, the sometimes terrible consequences of sex.