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.
有一個古老的儀式已經為人所知超過一百年了。傳說，人們對著鏡子說三遍黑桃皇后的名字，她就可以通過畫在鏡子上的門和樓梯被召喚出來。黑桃皇后從照鏡子的人中獲得能量，她會剪睡夢中的人的頭發，那些看到她的人不是瘋了就是死了。四個年輕人開玩笑決定要召喚她，但是當其中一個人死于突發性心臟病，剩下的幾個人意識到他們要面對的是匪夷所思的事件和死亡的危險。