在这部邪魔恐怖片中,略显颓废的单身汉道格拉斯·艾尔姆尔（马克·伯查特 Mark Borchardt 饰）是一幢老旧公寓内的管理员，他每天做着枯燥无味的工作，间或以自由撰稿人的身份写写文字，不经意间的思绪却都留在女友朱丽叶（Gizelle Erickson 饰）的身上。此前朱丽叶饮弹自尽，但道格拉斯始终感觉女友又回到了自己的身边。
某天，一名公寓的老人心脏病发作死亡，接着另一名老妇人也意外跌落楼梯死去。道格拉斯隐约感觉，这一切似乎都与不请自来住进地下室的女孩卡尔娜（纳迪安·格劳斯 Nadine Gross 饰）有关。职业的敏感促使他追寻卡尔娜的真实身份，却意外开启了一扇通往未知恐怖世界的大门……
Douglas Elmore is an alcoholic writer and caretaker haunted by visions of his dead wife and pursued by supernatural forces bent on revenge for his past deeds. When tenants start turning up dead in the hallways and stairwells of his brownstone apartment building, Douglas suspects a strange but sexually alluring homeless prostitute named Karna who sleeps in his basement by day and prowls the empty city by night. But as the bodies pile up, Douglas is torn between his growing obsession with Karna and the threat of becoming a prime suspect in a murder investigation. Douglas must find the origin of the evil residing in the old Hagstone building before the secrets of his past return to destroy him.
