Luna, a cruise ship chambermaid, has to quit her job to attend to her sick brother. While doing so, she discovers that her mother has gone missing and her brother's condition is getting progressively worse. The siblings desperately sneak into an empty condo unit but soon discover that Penthouse 77 is not what it seems.

　　Luna, a cruise ship chambermaid, has to quit her job to attend to her sick brother. While doing so, she discovers that her mother has gone missing and her brother's condition is getting progressively worse. The siblings desperately sneak into an empty condo unit but soon discover that Penthouse 77 is not what it seems.

　　老楼真有鬼，背后不是人！青年录音师入住鬼楼，听到鬼频率，看到鬼飘移……长发女鬼，时隐时现，时而爆发出惊人尖叫，时而传来隐隐的鬼哭……突然之间，女鬼出现在房顶，一回头，女鬼又惊现在被子里！惨叫不断，惊吓不断，鬼魅血脸狰狞扭曲，阴森鬼爪惊悚索命！女主陪同男主勇闯鬼楼，挑战千年怨灵，等待他们的是冤魂的报复？还是厉鬼的劫杀？一切都是未知！月圆之夜，人鬼决战呈现在荒郊野外，鬼BOSS终于邪恶登场，终极颤栗一触即发！谁敢回头看背后？颤抖吧，尖叫吧！