Office is haunted. An office building in Hong Kong is so evil that nine people die here every year.
Apan just came to work in a securities company in this building and found that none of his female colleagues used the last space in the women's restroom because it was "unclean". At first, Apan didn't understand the meaning, but later she It was discovered that two women had giggled at the last square of the toilet, and then committed suicide in mysterious ways. Only then did Apan understand the meaning. One night, Apan and another female employee worked overtime. Near midnight, another female employee received news that her husband had a car accident. Then the female employee went to the hospital, leaving Apan alone in the company. Not long after, something strange happened on the entire floor of the office building. Apan wanted to escape, but found himself in the women's bathroom. She bravely opened the last compartment of the toilet and found that it was the ghosts of two dead female employees. Apan instantly became sluggish. The next day, Apan also committed suicide by jumping off the building.
Kevin is also the boss of a company in this office building. He hates Sister Mary who works here very much and always deliberately makes things difficult for him. After a vacation, he returned to the company, only to receive the news that everyone in the company was dead. However, he could still see the company's employees. To this end, he sought help from a Feng Shui master. The master gave him cow's tears to find out the true identity of the ghost. Kevin was frightened and overwhelmed after doing so. Later, the ghosts came to the door and asked Kevin to take care of the company seriously from now on. After Kevin agreed, the ghost agreed to let him go.
Ken is also a new employee of a toy company in this building, where he met a woman in red named Ashan. Ashan said she had yin and yang eyes and could see ghosts. She is often pestered by a woman dressed in white, who also harms her younger brother. One night, Ashan told Ken that the woman in white would not give up until she died. Ashan jumped downstairs, and Ken jumped down too. However, Ashan's influence disappeared instantly. When Ken landed, he realized that he had become a ghost. It turns out that Ashan is the evil ghost, and the woman in white is the one with yin and yang eyes. She wanted to help Ken, but was threatened by Ashan. Therefore, Ashan's plan will succeed.