Year 1988. The inhabitants of the United States are terrified by a series of satanic murders that have been carried out throughout the country, and those responsible seem to be attending heavy metal concerts. Three girls in their twenties, Alexis, Val and Beverly, meet three other boys, Mark, Kovacs and Ivan, during a concert and decide to go together to Alexis’s summer house. There, the boys will discover that, far from being the rock lovers they had claimed to be, the girl group is passionate about something much more sordid and terrifying than music.