Cast: 李淳、黄璐、龚子涵 、邓竞
Ground subsidence occurs in a suburban area. A team of engineers is dispatched to investigate the cause. Team member HAO carries heavy instrument every day, wandering in the empty suburb. One day, the investigation brings him to a primary school. He finds a diary book, which chronicles the growth of a boy and the separation of an intimate group. As the investigation proceeds, HAO discovers that the diaries are prophecies of his own life.