Wong Suet-chung
Cao Xiao-xue
Fat Man
Daniel Wong
Sin-yi
Headmaster Winnie Tsang
Helen
Byron
Ka-yin
Alan
Suet-chung's Mother
Bamboo
Ho Shum
Policeman Kennedy Town Station
Off-Dity Policeman
Human Resources Manager
Docent for the Blue House
Cao Xiao-xue (Child)
Student
Newly arrived in Hong Kong, language teacher Xiao-xue is fascinated by the mysterious dot graffiti around subway stations and tries to discover its meaning.
