The film revolves around five young adults who are about to find themselves in a fight for their lives, pitted against evil itself. While on vacation in a foreign city, one of the five makes a seemingly innocent albeit ignorant mistake and soon all of them will realize the cost of such an inconsequential action.
In the middle of the night, Harold Dingle, the owner of a website dedicated to slasher films who has been hired on to Perimount Production's upcoming remake of the cult classic Slaughter Camp 13, has his throat slit by a hooded assailant.
In an apartment somewhere in Sweden, a woman, a man and his friend are recording an amateur porn movie, while the one man's teenage son is trying to stay out of their way in his room. As time progresses, their filming gets out of hand. All the while, the father is concerned that his son has no respect for him, and the son is concerned about how his father treats the woman.
Cathy, the former star of a reality show similar to "The Bachelor", is now married and living with her husband in the house where the show took place. The house still has several secret rooms and passages, as well as a host of cameras all over the estate.
In Japan, a school's movie club was shut down when one member disappeared and another was hospitalized after suffering a nervous breakdown. Seven years later, two students, Maki and Ai, restart the club with the intention of making a horror film based on the events that led to the organization's closure. Three other girls (Natsuki, Yayoi, and Yuka) join the club, and they, Maki and Ai are taken to a secluded lodge called the Yuai House by Maki's sister Yoko, a teacher and former club member, who has brought along the awkward Takako.
Due to masturbating to Clown Porn, college student and sex addict Michael Brichums misses a date with his girlfriend, Carrie, prompting Carrie to dump him. Later, Mike goes to a sex shop, where he finds a magazine featuring Andromeda Strange, an alt porn star whose films are so extreme they have been banned in numerous countries. Mike asks the clerk about Andromeda, and is told that obscenity laws prohibit the store from selling her merchandise, but he can probably find her films online. When Mike leaves, the clerk disappears, leaving another employee (who was in the washroom) to find Mike's receipt, and wonder "Who the Hell rang this up?"
The film follows Max Parry (Kevin Howarth), a disturbed wedding video cameraman, and his unnamed assistant (Mark Stevenson) as they perform several murders that they have videotaped. The two have used a video store tape in order to record the proceedings, breaking the fourth wall and insinuating that the copy of the film being watched is the only existing version of the tape. Throughout the film Max uses meta-references in order to show off his gruesome activities as a serial killer. The film raises questions surrounding visceral pleasure, this can be seen in one scene in particular during which the audience cannot see the victims (two at once) being murdered, Max Parry then asks the audience "I bet you wanted to see that, and if you didn't, why are you still watching?"
The film centers around a serial killer known as "The Card Player", who is kidnapping young women in Rome. Using a webcam set-up, the killer challenges the police by forcing them to play hands of Internet poker. If the police lose, the kidnapped victim is tortured and murdered on-screen. When a British tourist is among the girls murdered, policeman John Brennan (Cunningham) is assigned the case and quickly teams up with Italian detective Anna Mari (Rocca). The duo have their work cut out for them when the Police Chief's daughter (Argento) becomes the killer's latest kidnapping victim.
Like its predecessor, Mordum is presented as a degraded home movie shot by serial killers, in this case returning character Peter, his sadomasochistic girlfriend Crusty, and her sexually depraved manchild brother Maggot (the status of the cameraman from the first film is unrevealed).
Thomas Cross est un informaticien, un peu voyeur, un peu pirate informatique. Il pose des webcams un peu partout et vit à travers celles-ci. Un jour, il assiste impuissant en direct au meurtre de Cathy, une exhibitionniste qu'il fréquente à travers son site web et sa live webcam.
A man knocks on a teenage girl's door, claiming to be in need of directions. When the girl leaves to answer the phone, the man sneaks in, and grabs her when she returns. Physically and verbally assaulting the girl, the man drags her into a bedroom by the neck, and rapes her. The rapist ejaculates and urinates on the teen's face, and asphyxiates her with a bag while yelling that Richard Ramirez is his "God". Tracking the killer is obnoxious Channel 5 Action News reporter Roberto Negro, who has been receiving taunting letters from the murderer, most of them containing rants about how he worships Satan.
Diane de Monx (Nielsen) is an executive trying to negotiate a deal to acquire the rights to the productions of a Japanese anime studio, which will soon include three-dimensional hentai, for the Volf Corporation. To facilitate the acquisition, she eliminates her superior, Karen (Dominique Reymond), and assumes control of her portfolio, her business partner Hervé (Berling), and her assistant Elise (Sevigny). Elise, however, despises Diane and works to frustrate her negotiations at every opportunity. Diane and Hervé travel to Japan to close the deal, and they enjoy a sexual flirtation which is unfulfilled at that time and seem to grow to like one another.