A bohemian artist travels from London to Italy with his estranged son to sell the house they inherited from his late wife.

Joe Johnson, at the top of his stand-up comic game, decides to share a Halloween weekend away with a group of friends. They decide on the theme of a 1980s retro party, and jokingly suggest that if they get drunk, high, and behave badly enough, hopefully they’ll attract their own psycho killer. The joke is suddenly very much on them though, as in turn they reach their grisly demise at the hands of The Heckler, an uninvited guest out to turn their nostalgic horror movie fantasy into a terrifying reality, before delivering an unforgettable punchline…