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 appearan小提示：神马影院(http://87jz.com/)提供最新电影、电视剧免费在线播放服务，如果觉得本站不错，可以分享给您的亲朋好友一起观看哦！