The educational system excludes children, families are breaking up and the economic, political and cultural threat from China is traumatic. Let loose, like wild animals in the urban jungle, some of them sink into a nihilistic revolt. Autumn Moon has left school and gets by on his wits, extorting money for a Mafia-type chief. While he's doing his rounds, he meets a girl named Ping and falls in love with her.
Ping suffers from an incurable illness.
They are both from broken homes and each day have to face the tension of inter-generational conflicts. Moon also becomes friends with a handicapped boy named Sylvester and protects him from attacks by local students. One day, a young schoolgirl kills herself and leaves two letters written in her own blood. Moon becomes obsessed by the image of this girl and decides, along with his friends, to find the people the letters are addressed to. Filled with a romantic passion for Ping, he dreams of finding the money needed to cure her.