After three years of marriage, Song Zhiwan's cell phone contained 365 missed calls to Gu Yanzhou. She never deleted it. Until that day she saw a note from another woman on Gu Yanzhou's cell phone - "I will pick it up in this life." The day Song Zhiwan left, he took nothing with him except an IOU. Later, Gu Yanzhou found a bankbook and a wedding photo in the iron box she left behind. There is a line of writing on the back of the photo. That line of writing made him stand in front of the window on the twenty-seventh floor, suddenly afraid to look down.
