The prologue deals with a grim witch-burning that occurred in the Black Forest of the Holy Roman Empire in the year 1619. However, this witch burning does not go completely as planned -- and it's worth mentioning that the witch herself is over 7 feet tall. 

In the present day, we meet Harper and John, two freshmen college students. Harper has just invited John to a party at her sorority house that night, and John eagerly accepts. Harper is being super-flirty with him, and he feels like this might finally be the night where something happens between them. 

Back at the Kappa Gamma Delta sorority house, however, we see Harper with her older sisters, and her invitation to John takes on a sinister tone. Also of note: although Harper herself is only 5'1, her older sorority sisters are massive amazons, especially Phoebe, the head of the house, who is over 7 feet tall. And it appears that Harper has...ambitions...to grow as big as her peers.