It stars David A. Hess and Giovanni Lombardo Radice as two criminals who infiltrate a posh gathering in a villa and violently turn against the partygoers after they mock them.

[1] Alex is a serial killer driving around New York City at night when he spots a young woman, Susan, moving alongside him.

Tom, Howard, and Glenda next play poker with Ricky while Lisa begins sexually teasing Alex and invites him upstairs to shower with her, only to push him away.

Laughing, Alex urinates on Howard and drags him back inside, tying him to a piano leg and proclaiming that he is running the party now.

Ricky then returns to the house with Gloria just as Alex forces Cindy to strip off the rest of her clothes and repeatedly slashes her with his razor.

Tom and Lisa take turns shooting Alex, who thrashes weakly in the water before a final bullet to the head by Howard finishes him for good.

The entire film was shot on a low budget, in only three weeks in September 1979, after Deodato had finished production on Cannibal Holocaust.

[1] Exteriors were done on location in New York City, while Interiors were completed at Incir De Paolis Studios in Rome, Italy.

In 2006, the BBFC commissioned a group of academics at the University of Wales, Aberystwyth to conduct research into people's responses to films that include scenes of sexual violence.

[citation needed] The American company Media Blasters released the film on DVD through their Shriek Show label in its fully uncut form on 17 December 2002.

[6] It was released on Blu-ray by Severin Films on 29 March 2022, with a newly scanned 4K transfer from the original camera negative, a bonus documentary disc, Deodato Holocaust, and a soundtrack CD by Riz Ortolani.

[7] On 27 February 2011, the Dread Central movie website exclusively reported that UK production company North Bank Entertainment were teaming up with director Deodato and actor Radice for The House on the Edge of the Park Part II, a direct sequel to the original film.