The film is adapted from a Hongkong writer Li Bihua "night" series of novels in the original lineup, behind almost all Hongkong local forces, including Tony Leung, Simon Yam, starring Gu Mei, Kelly Chan, Maggie Siu, Eileen Tung, Siu Yam Yam, the director, Gordon Chan, squad including Chen Guo Li Zhiyi, Liu Guochang, Simon Yam and Teddy Robin in addition to a star, but also as a a director, this will be Simon Yam's maid.