A girl with a fetish for sex with strangers uses a penis-shaped dildo and a poster of a naked hunk to fulfill her fantasy. Later, seven strangers including the girl, whose name turns out to be Joy, gather on a stormy night at a remote mansion after receiving a mysterious invitation, one half of a torn thousand dollar bill and the promise of a lucrative business opportunity. Trevor Fairbanks is a famous posh actor who needs a career boost, Priscilla Vogue is a famous fashion model always up for some sensual work, Sugar is a self proclaimed sugar baby always on the lookout for the next sugar daddy, Slick is a sleazy nickle and dime salesman who can't resist hitting on each girl there and offering them his latest silly novelty items, Inspector #6 (whose name everyone keep getting wrong) is a clothing inspector and a sissy, who secretly enjoys women's underwear, takes great pride in his work and dreams of becoming Inspector #1 one day, while Doctor Rivameter is seemingly just a stuck up doctor. Instead of the host, they find a letter asking them to wait in the house until morning, when everything will be explained to them. The group soon realizes what it is that they all have in common - they've all invested in the so-called tontine, a real but archaic type of investment plan mostly used between the 17th and the 19th century, where all the money goes to the last living investor. Having cleared that up, they split into couples and try to spend the night having fun with each other in their rooms. However, they soon start mysteriously dying one by one. Of course, by the end of this good-natured adult spoof of whodunit mysteries, nothing ends up being what it seems - not even the murders.