Corrine immediately imprisons Lindsay in preparation for her initiation into the sorority and kills Trina Goodwin, as she is no longer of any use to Corrine. Sarah escapes with Finn and the two end up having sex in order to keep him from being sacrificed in a ceremony where the Alpha Nus will throw virgins into their Eternal Flame to keep it burning. Sarah and Lindsay are both initiated into their respective houses (Sarah into Pi Epsilon Delta, Lindsay into Alpha Nu) and Lindsay is horrified when she discovers that the Alpha Nus are intent on sacrificing her. While the Deltas cast a shielding spell to trap the most of the Alpha Nu's inside the house, Sarah manages to successfully rescue her sister, almost dying in the process, and after a struggle pushes Corrine into the Eternal Flame. After they return to the Pi Epsilon Delta house, Dr. Hunter uses Lindsay's inner power to heal her and returns the Knife of Truth to its resting place, while Sarah leads the Deltas into the night to find and destroy the remaining Alpha Nu's. The film ends with a voiceover from Esme saying ""That the trouble with fire. You never know when it's going to flare up again."" as she walks off into the distance with the remains of the Eternal Flame in a small cauldron.