This is a movie about an office ghost story. Pat (played by Karen Mok) who is a newcomer just came to work in a company in this building and met her ex-boyfriend Ken (played by Stephen Fung). The two chatted for a while, and then Pat took the elevator back to the company. There was only a woman in white in the elevator. She squatted on the ground and kept saying "I'm sorry", which Pat found very strange. Colleagues said it might be caused by the approaching Ghost Festival... Pat found Connie, the secretary of the company next door, talking to the person in the last cubicle in the toilet, but she didn't pay attention at the time. Then there was a scream in the women's toilet. When everyone arrived, Connie had hanged herself in the toilet and died, with a strange smile on her face. Ken also saw the woman in white in the lobby, and there was a woman in red beside her. The woman in red told him that the woman in white was a ghost and was forcing her to jump off the building...