日韩免费高清视频网站-最新日剧韩剧、VIP高清韩国电影、好看的网络短剧、热门综艺等在线免费观看 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.