A group of young people arrives to a remote village where they encounter an ancient spirit – a succubus – that can take human disguise. It feeds on one’s deepest fears and brings out the darkest side in people. 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.