这是一部关于办公室鬼故事的电影。

新人阿Pat（莫文蔚 饰）刚来这栋大楼的一间公司上班，遇到了前男友阿Ken（冯德伦 饰）。两人聊了一会儿，随后阿Pat乘电梯回公司。电梯内一名只有白衣女子，她蹲在地上不停说“对不起”，阿Pat觉得十分诡异。同事说可能是鬼节将至造成…

阿Pat在厕所发现隔壁公司的秘书Connie在不停和最后一格的人说话，当时没有留意。之后女厕内突然传来一声尖叫，当众人赶到时，Connie已经在厕所上吊自杀身亡，她的脸上还挂着一个奇怪的笑容。

Ken在大堂也看到了白衣女子，身边还有一个红衣女子。红衣女子对他说，白衣女子是鬼，正在逼她跳楼…

Employees working at a high rise building begin encountering a series of strange occurrences. Ken, a recent hire who attracts to the lovely, but spiritually harried Shan. Meanwhile, Pat is apparently terrorized by the evil demon who resides in the last stall of the woman's bathroom. And Richard, a mean boss of another company in the same building, wants to get rid of his long-time employee Mary and begins to suspect that his entire staff has become ghosts.

Trois différentes histoires ayant comme ligne conductrice un immeuble de bureau ou chaque année, neuf personnes doivent y trouver la mort.

음력 7월이 되면 꼭 9명의 사람이 죽어나간다는 빌딩의 이야기를 다룬 도시괴담 형태의 영화