Several young couples travel to a private island for a mysterious training retreat that promises to strengthen their relationship. However, during the Retreat, the heroes encounter an ancient demon - a Succubus. This monster feeds on the life energy of people, taking on someone else's appearance and provoking victims to show the worst qualities and do terrible things.
A withdrawn young girl joins an unpopular sorority in college. It turns out she has psychic and telekinetic powers, and she uses them against a rival sorority.