日韩电影手机在线观看_免费热播电视剧2023最新推荐日韩大片免费观看视频播放-日韩电影免费在线观看中文字幕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.