AllMovie

Surveyor Hao (Mason Lee) is part a team of engineers sent to an abandoned Chinese housing development to investigate the possibility of building a subway below. While wandering through a school, he finds the diary of a young boy, also named Hao (Gong Zihan), who goes on a quest with his friends in which they begin to disappear one by one. As the older Hao continues his work, his path intersects with that of the young boy. Written and directed by Sheng Qiu.