A girl's discreet attempt to assess her one night stand and his friends takes a deadly turn when she and her roommates host a dinner party where they unknowingly unleash a malevolent force.

A young man likes his deceased sister's boyfriend. He torments him by sending strangers uninvited to his apartment for gay hookups. Eventually the older man rescues the young man from a sex party, and they are thrown together to navigate their new relationship - eventually aboard a cruise ship. The movie becomes a movie-within-a-movie by the end.