《两性奥秘纪录片全集》高清电影在线-完结手机免费观看-奥特曼大电影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.