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.

Moses Chan
as Wong Suet-chung

Meng Ting-yi
as Cao Xiao-xue

Lam Tze-Chung
as Fat Man

David Siu Chung-Hang
as Daniel Wong

Candy Cheung Shuet-Kan
as Sin-yi

Susan Shaw Yam-Yam
as Headmaster Winnie Tsang

Crystal Cheung
as Helen

Patrick Wong
as Byron

Kit Mung
as Ka-yin

Alexander Charles Hochner
as Alan