It's an imaginative satire of modern China. In a rural setting, and over the course of one night, people start dreamwalking - carrying out activities that they were thinking about or doing before they went to sleep. Slowly the night becomes more chaotic and violent. Lin is a 14 year old boy and his parents try to stem the tied and work to making the sun come up again and the night to end.
My main criticism of this interesting interpretation of the dangers of modernisation, the great dream of renewal, is it seemed to meander repetitively for some time before something new was introduced. The cheeky thoughts of Lin and how he viewed his world before dreamwalking was a highlight for me.