郊区某处突发地面沉降，一队工程师前往调查原因。队员夏昊每天背着沉重的测量设备，在已经撤空的郊区里游荡。一日，他进入一间无人的小学，读到一本日记，里面记载了少年隐秘的成长和一个团体的破裂，随着调查的进行，夏昊发现，日记预言了一切。Some ground subsidence has occurred in a suburban area and a team of engineers, including Hao, is dispatched to investigate the cause. After days of wandering around in the empty suburb looking for answers and carrying his heavy gear, Hao walks into a primary school where he finds a diary chronicling the story of a boy and the separation of what seems to be an intimate group. As the investigation keeps going, Hao discovers that this diary might contain prophecies about his own life.