A group of girlfriends prepare for the anticipated summer party in a cramped bathroom. Between boy talk and makeup, Mercedes navigates her blossoming attraction for her friend Julia.
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.
